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 Page 2


Free coa 
 
 
 
 
 
   
 
   
 
                               
        
 
    
  
  
 
                           
         
 ote   
    Prove that the volume of a hemisphere is
 
 
  a
 
 
    Prove that the  volume of  a sphere of ra ius a is
 
 
  a
 
 
      segment is  ut off from  a sphere of ra ius a  y a plane at a  istan e  a / from the  entre Show that the  
volume of the segment is    / of the volume of the sphere  
 x     in  the volume of  the para oloi  generate   y the revolution of the para ola y
 
  ax  a out  x axis  
from x    to x h   
Sol
 
   he equation of the para ola is  
y
 
  ax 
 he require  volume of the para oloi  is  
  ? y
 
 x   
 
 
 ? ax x   a 
 
 
*
x
 
 
+
 
 
   h
 
  
 x       he area of the para ola  y
 
  ax lying  etween the vertex an  the latus  re tum is revolve  a out x axis  
 in   the volume generate   
Sol
 
   he equation of the para ola is y
 
  ax 
 y revolving the area of the given para ola lying  etween the vertex an  the latus retum we get a para oloi  
 he limits for the para oloi  will  e from x    to x a   
 en e the require  volume of the para oloi  is  
? y
 
 
 
  x  ? ax x
 
 
   a *
x
 
 
+
 
 
   a 
 
 
a
 
   a
 
 
 x     in  the volume of the soli  generate   y revolving the ellipse 
x
 
a
 
 
y
 
 
 
   a out the x axis   
Sol
 
  the equation of the ellipse is  
x
 
a
 
 
y
 
 
 
    a out  the x axis    
 he require  volume of the soli  
   ? y
 
 
 
  x 
   ?
 
 
a
 
 
 
(a
 
 x
 
) x                          * 
x
 
a
 
 
y
 
 
 
  + 
   
 
 
a
 
*a
 
x 
x
 
 
+
 
 
 
 
 
 a 
 
 
 x    Prove that the volume of the soli  gererate   y the revolution of an ellipse roun  its minor axis is  a  
means proportional  etween those generate   y the revolution of the ellipse an  of the auxliary  ir le a out 
the major axis   
Sol
 
   he equation of the ellipse is  
x
 
 
 
 
y
 
 
 
   
 n   the equation of the auxiliary  ir le is  
x
 
 y
 
 a
 
 
the volume of the soli   generate   y the revolution of the ellipse a out the major axis (x axis) is  
 
 say  hen 
 
 
 
 
 
 a 
 
 
 n  the volume of the sphere generate   y the revolution of the  auxliary   ir le a out x axis is  
 
  hen  
 
 
 
 
 
  a
 
 
 he volume of the soli  generate   y the revolution of the ellipse a out y axis is   ? x
 
 y
 
 
 
  ?
a
 
 
 
( 
 
 y
 
)
 
 
  y                         * 
x
 
a
 
 
y
 
 
 
  + 
 
 
Page 3


Free coa 
 
 
 
 
 
   
 
   
 
                               
        
 
    
  
  
 
                           
         
 ote   
    Prove that the volume of a hemisphere is
 
 
  a
 
 
    Prove that the  volume of  a sphere of ra ius a is
 
 
  a
 
 
      segment is  ut off from  a sphere of ra ius a  y a plane at a  istan e  a / from the  entre Show that the  
volume of the segment is    / of the volume of the sphere  
 x     in  the volume of  the para oloi  generate   y the revolution of the para ola y
 
  ax  a out  x axis  
from x    to x h   
Sol
 
   he equation of the para ola is  
y
 
  ax 
 he require  volume of the para oloi  is  
  ? y
 
 x   
 
 
 ? ax x   a 
 
 
*
x
 
 
+
 
 
   h
 
  
 x       he area of the para ola  y
 
  ax lying  etween the vertex an  the latus  re tum is revolve  a out x axis  
 in   the volume generate   
Sol
 
   he equation of the para ola is y
 
  ax 
 y revolving the area of the given para ola lying  etween the vertex an  the latus retum we get a para oloi  
 he limits for the para oloi  will  e from x    to x a   
 en e the require  volume of the para oloi  is  
? y
 
 
 
  x  ? ax x
 
 
   a *
x
 
 
+
 
 
   a 
 
 
a
 
   a
 
 
 x     in  the volume of the soli  generate   y revolving the ellipse 
x
 
a
 
 
y
 
 
 
   a out the x axis   
Sol
 
  the equation of the ellipse is  
x
 
a
 
 
y
 
 
 
    a out  the x axis    
 he require  volume of the soli  
   ? y
 
 
 
  x 
   ?
 
 
a
 
 
 
(a
 
 x
 
) x                          * 
x
 
a
 
 
y
 
 
 
  + 
   
 
 
a
 
*a
 
x 
x
 
 
+
 
 
 
 
 
 a 
 
 
 x    Prove that the volume of the soli  gererate   y the revolution of an ellipse roun  its minor axis is  a  
means proportional  etween those generate   y the revolution of the ellipse an  of the auxliary  ir le a out 
the major axis   
Sol
 
   he equation of the ellipse is  
x
 
 
 
 
y
 
 
 
   
 n   the equation of the auxiliary  ir le is  
x
 
 y
 
 a
 
 
the volume of the soli   generate   y the revolution of the ellipse a out the major axis (x axis) is  
 
 say  hen 
 
 
 
 
 
 a 
 
 
 n  the volume of the sphere generate   y the revolution of the  auxliary   ir le a out x axis is  
 
  hen  
 
 
 
 
 
  a
 
 
 he volume of the soli  generate   y the revolution of the ellipse a out y axis is   ? x
 
 y
 
 
 
  ?
a
 
 
 
( 
 
 y
 
)
 
 
  y                         * 
x
 
a
 
 
y
 
 
 
  + 
 
 
Free M 
 
   
a
 
 
 
? ( 
 
 y
 
) y
 
 
   
a
 
 
 
 * 
 
y 
y
 
 
+
 
 
 
 
 
 a
 
   
 
(say) 
 ow the mean proportional  etween  
 
 an   
 
 
 v( 
 
 
 
) 
v
 
 
 a 
 
 (
 
 
 a
 
) 
 
 
 a
 
   
 
  olume generate   when ellipse is revolve  a out major axis  
 x      he  urve y
 
(a x) x
 
( a x) revolves a out the x axis  in  the volume generate   y the loop    
Sol
 
   he given  urve is  
y
 
(a x) x
 
( a x) 
 he require  volume generate   y the loop  
 ? y
 
 y
  
 
 
  ?
x
 
( a x)
(a x)
 x
  
 
 
  ? , x
 
  ax  a
 
 
 a
 
x a
- x
  
 
 
  * 
x
 
 
 
 a x
 
 
  a
 
x  a
 
log(x a) +
 
  
  a
 
, log   - 
 x     in  the volume generate   y the revolution of the loop of the  urve y
 
 (a x) x
 
(a x) a out the x axis    
Sol
 
   he given  urve is y
 
(a x) x
 
(a x) 
 he require  volume generate   y the loop  
 ? y
 
 x
 
 
 
  ?
x
 
(a x)
a x
 
 
  x 
 ? , x
 
  ax  a
 
 
 a
 
a x
- x
 
 
 
  * 
x
 
 
  a
x
 
 
  a
 
x  a
 
log(a x)+
 
 
 
  *
a
 
 
 a
 
  a
 
  a
 
log a  a
 
loga+  * 
 a
 
 
  a
 
log +   
 
[log  
 
 
]  
 x     in  the volume of the soli  generate   y the revolution  of the loop  of the  urve y
 
 x
 
(a x) a out the 
x axis  
Sol
 
    he given  equation is y
 
 x
 
 (a x) 
 ? y
 
 
 
  x  ? x
 
 
 
(a x) x  *
 
 
ax
 
 
x
 
 
+
 
 
  a
 
 [
 
 
 
 
 
] 
 
  
 a
 
 
 x     in  the volume of the soli  generate   y the revolution of the  urve y 
a
 
(a
 
 x
 
)
 a out its asymptote  
Sol
 
    he given equation of the  urve is  
y 
a
 
(a
 
 x
 
)
          or          x
 
y a
 
(a y) 
 he require  volume  
  ? y
 
  x   ?
a
 
(x
 
 a
 
)
 
  x
 
 
 
 
 
Putting x atan  
    x ase 
 
    
 he require  volume  
   a
 
?
se 
 
   
se 
 
 
  /
 
   a
 
? os
 
   
  /
 
 
 
 
 
 
a
 
  ( erify ) 
 x    Prove that the volume of the soli  generate   y revolving the asteroi  x
 
 
 y
 
 
 a
 
 
 a out the x axis is 
  
   
 a
 
 
Solution  he given  urve is  
x
  /
 y
  /
 a
  /
 
 he require  volume 
  ? y
 
 x
 
 
   ? (a
  /
 x
  /
)
 
 x
 
 
 
 
 
 
Page 4


Free coa 
 
 
 
 
 
   
 
   
 
                               
        
 
    
  
  
 
                           
         
 ote   
    Prove that the volume of a hemisphere is
 
 
  a
 
 
    Prove that the  volume of  a sphere of ra ius a is
 
 
  a
 
 
      segment is  ut off from  a sphere of ra ius a  y a plane at a  istan e  a / from the  entre Show that the  
volume of the segment is    / of the volume of the sphere  
 x     in  the volume of  the para oloi  generate   y the revolution of the para ola y
 
  ax  a out  x axis  
from x    to x h   
Sol
 
   he equation of the para ola is  
y
 
  ax 
 he require  volume of the para oloi  is  
  ? y
 
 x   
 
 
 ? ax x   a 
 
 
*
x
 
 
+
 
 
   h
 
  
 x       he area of the para ola  y
 
  ax lying  etween the vertex an  the latus  re tum is revolve  a out x axis  
 in   the volume generate   
Sol
 
   he equation of the para ola is y
 
  ax 
 y revolving the area of the given para ola lying  etween the vertex an  the latus retum we get a para oloi  
 he limits for the para oloi  will  e from x    to x a   
 en e the require  volume of the para oloi  is  
? y
 
 
 
  x  ? ax x
 
 
   a *
x
 
 
+
 
 
   a 
 
 
a
 
   a
 
 
 x     in  the volume of the soli  generate   y revolving the ellipse 
x
 
a
 
 
y
 
 
 
   a out the x axis   
Sol
 
  the equation of the ellipse is  
x
 
a
 
 
y
 
 
 
    a out  the x axis    
 he require  volume of the soli  
   ? y
 
 
 
  x 
   ?
 
 
a
 
 
 
(a
 
 x
 
) x                          * 
x
 
a
 
 
y
 
 
 
  + 
   
 
 
a
 
*a
 
x 
x
 
 
+
 
 
 
 
 
 a 
 
 
 x    Prove that the volume of the soli  gererate   y the revolution of an ellipse roun  its minor axis is  a  
means proportional  etween those generate   y the revolution of the ellipse an  of the auxliary  ir le a out 
the major axis   
Sol
 
   he equation of the ellipse is  
x
 
 
 
 
y
 
 
 
   
 n   the equation of the auxiliary  ir le is  
x
 
 y
 
 a
 
 
the volume of the soli   generate   y the revolution of the ellipse a out the major axis (x axis) is  
 
 say  hen 
 
 
 
 
 
 a 
 
 
 n  the volume of the sphere generate   y the revolution of the  auxliary   ir le a out x axis is  
 
  hen  
 
 
 
 
 
  a
 
 
 he volume of the soli  generate   y the revolution of the ellipse a out y axis is   ? x
 
 y
 
 
 
  ?
a
 
 
 
( 
 
 y
 
)
 
 
  y                         * 
x
 
a
 
 
y
 
 
 
  + 
 
 
Free M 
 
   
a
 
 
 
? ( 
 
 y
 
) y
 
 
   
a
 
 
 
 * 
 
y 
y
 
 
+
 
 
 
 
 
 a
 
   
 
(say) 
 ow the mean proportional  etween  
 
 an   
 
 
 v( 
 
 
 
) 
v
 
 
 a 
 
 (
 
 
 a
 
) 
 
 
 a
 
   
 
  olume generate   when ellipse is revolve  a out major axis  
 x      he  urve y
 
(a x) x
 
( a x) revolves a out the x axis  in  the volume generate   y the loop    
Sol
 
   he given  urve is  
y
 
(a x) x
 
( a x) 
 he require  volume generate   y the loop  
 ? y
 
 y
  
 
 
  ?
x
 
( a x)
(a x)
 x
  
 
 
  ? , x
 
  ax  a
 
 
 a
 
x a
- x
  
 
 
  * 
x
 
 
 
 a x
 
 
  a
 
x  a
 
log(x a) +
 
  
  a
 
, log   - 
 x     in  the volume generate   y the revolution of the loop of the  urve y
 
 (a x) x
 
(a x) a out the x axis    
Sol
 
   he given  urve is y
 
(a x) x
 
(a x) 
 he require  volume generate   y the loop  
 ? y
 
 x
 
 
 
  ?
x
 
(a x)
a x
 
 
  x 
 ? , x
 
  ax  a
 
 
 a
 
a x
- x
 
 
 
  * 
x
 
 
  a
x
 
 
  a
 
x  a
 
log(a x)+
 
 
 
  *
a
 
 
 a
 
  a
 
  a
 
log a  a
 
loga+  * 
 a
 
 
  a
 
log +   
 
[log  
 
 
]  
 x     in  the volume of the soli  generate   y the revolution  of the loop  of the  urve y
 
 x
 
(a x) a out the 
x axis  
Sol
 
    he given  equation is y
 
 x
 
 (a x) 
 ? y
 
 
 
  x  ? x
 
 
 
(a x) x  *
 
 
ax
 
 
x
 
 
+
 
 
  a
 
 [
 
 
 
 
 
] 
 
  
 a
 
 
 x     in  the volume of the soli  generate   y the revolution of the  urve y 
a
 
(a
 
 x
 
)
 a out its asymptote  
Sol
 
    he given equation of the  urve is  
y 
a
 
(a
 
 x
 
)
          or          x
 
y a
 
(a y) 
 he require  volume  
  ? y
 
  x   ?
a
 
(x
 
 a
 
)
 
  x
 
 
 
 
 
Putting x atan  
    x ase 
 
    
 he require  volume  
   a
 
?
se 
 
   
se 
 
 
  /
 
   a
 
? os
 
   
  /
 
 
 
 
 
 
a
 
  ( erify ) 
 x    Prove that the volume of the soli  generate   y revolving the asteroi  x
 
 
 y
 
 
 a
 
 
 a out the x axis is 
  
   
 a
 
 
Solution  he given  urve is  
x
  /
 y
  /
 a
  /
 
 he require  volume 
  ? y
 
 x
 
 
   ? (a
  /
 x
  /
)
 
 x
 
 
 
 
 
 
Free c 
 
Putting x asin
 
  
  x  a sin
 
  os    
   ? a
 
 os
 
  a sin
 
  os   
   
 
   a
 
? sin
 
  os
 
   
   
 
  
   a
 
 
 .
 
 
/ ( )
  .
  
 
/
 
  
   
 a
 
 
 x    Show that the volume of the soli  generate   y the revolution of the  urve (a x)y
 
 a
 
x a out its asymptote 
is
 
 
 
 
a
 
   
Solution    he given  urve is 
(a x)y
 
 a
 
x 
 he require  volume  
  ? (a x)
 
 
 
 y 
   ? *a 
ay
 
a
 
 y
 
+
 
 
 
 y   ?
a
 
(a
 
 y
 
)
 
 y
 
 
   a
 
?
 y
(a
 
 y
 
)
 
 
 
 
Put y a tan  
  y ase 
 
    
  he require  volume  
   a
 
?
ase 
 
   
a
 
(  tan
 
 )
 
  /
 
   a
 
?
  
se 
 
 
  /
 
   a
 
? os
 
   
  /
 
   a
 
 
 
 
 
 
 
 
 
 
 
 
a
 
  
 x     in  the volume of the soli  generate   y the revolution of the  issoi  y
 
( a x) x
 
 a out its asymptote   
Solution  he given  urve is  
y
 
( a x) x
 
 
 he require  volume  ? ( a x)
 
 y
 
 
   ? ( a x)
 
 
 
  
  
  x 
 ow y
 
( a x) x
 
 
or      y v(
x
 
 a x
) 
 
 y
 x
 
( a x)
  /
 
 
x
  /
  
   
 
 
 
( a x)
    
( a x)
 
 x
  /
( a x) x
  /
 ( a x)
  /
 
 
 y
 x
 
x
  /
( a x)
( a x)
  /
                           y 
x
  /
( a x)
( a x)
  /
 x 
 en e the require  volume  
   ? ( a x)
 
  
   
x
  /
( a x)
( a x)
  /
 x 
   ? ( a x)
  
 
v( ax x
 
) x 
   ? ( a  a sin
 
 )
   
 
 a sin  os    a sin  os          (Put x  a sin
 
   x  a sin  os   )  
    a
 
? (   sin
 
 )
   
 
sin
 
  os
 
     
    a
 
*? sin
 
  os
 
   
   
 
? sin
 
  os
 
   
   
 
+  
    a
 
*  
 (  / ) (  / )
   ( )
  
 (  / ) (  / )
   ( )
+    a
 
 [
  
  
 
 
  
]   
 
a
 
  
 x     in  the volume of the soli s forme   y revolving the  y loi  x a(  sin ) y a (   os ) a out its  ase  
Sol
 
   he given equations are 
x a(  sin ) y a(   os ) 
 en e the require  volume  
 ? y
 
  x
  
 
 
  ? a
 
 (   os )
 
 
 x
  
   
  
 
 
  ? a
 
 (   os )
 
 a(   os )   
  
 
 
 
 
Page 5


Free coa 
 
 
 
 
 
   
 
   
 
                               
        
 
    
  
  
 
                           
         
 ote   
    Prove that the volume of a hemisphere is
 
 
  a
 
 
    Prove that the  volume of  a sphere of ra ius a is
 
 
  a
 
 
      segment is  ut off from  a sphere of ra ius a  y a plane at a  istan e  a / from the  entre Show that the  
volume of the segment is    / of the volume of the sphere  
 x     in  the volume of  the para oloi  generate   y the revolution of the para ola y
 
  ax  a out  x axis  
from x    to x h   
Sol
 
   he equation of the para ola is  
y
 
  ax 
 he require  volume of the para oloi  is  
  ? y
 
 x   
 
 
 ? ax x   a 
 
 
*
x
 
 
+
 
 
   h
 
  
 x       he area of the para ola  y
 
  ax lying  etween the vertex an  the latus  re tum is revolve  a out x axis  
 in   the volume generate   
Sol
 
   he equation of the para ola is y
 
  ax 
 y revolving the area of the given para ola lying  etween the vertex an  the latus retum we get a para oloi  
 he limits for the para oloi  will  e from x    to x a   
 en e the require  volume of the para oloi  is  
? y
 
 
 
  x  ? ax x
 
 
   a *
x
 
 
+
 
 
   a 
 
 
a
 
   a
 
 
 x     in  the volume of the soli  generate   y revolving the ellipse 
x
 
a
 
 
y
 
 
 
   a out the x axis   
Sol
 
  the equation of the ellipse is  
x
 
a
 
 
y
 
 
 
    a out  the x axis    
 he require  volume of the soli  
   ? y
 
 
 
  x 
   ?
 
 
a
 
 
 
(a
 
 x
 
) x                          * 
x
 
a
 
 
y
 
 
 
  + 
   
 
 
a
 
*a
 
x 
x
 
 
+
 
 
 
 
 
 a 
 
 
 x    Prove that the volume of the soli  gererate   y the revolution of an ellipse roun  its minor axis is  a  
means proportional  etween those generate   y the revolution of the ellipse an  of the auxliary  ir le a out 
the major axis   
Sol
 
   he equation of the ellipse is  
x
 
 
 
 
y
 
 
 
   
 n   the equation of the auxiliary  ir le is  
x
 
 y
 
 a
 
 
the volume of the soli   generate   y the revolution of the ellipse a out the major axis (x axis) is  
 
 say  hen 
 
 
 
 
 
 a 
 
 
 n  the volume of the sphere generate   y the revolution of the  auxliary   ir le a out x axis is  
 
  hen  
 
 
 
 
 
  a
 
 
 he volume of the soli  generate   y the revolution of the ellipse a out y axis is   ? x
 
 y
 
 
 
  ?
a
 
 
 
( 
 
 y
 
)
 
 
  y                         * 
x
 
a
 
 
y
 
 
 
  + 
 
 
Free M 
 
   
a
 
 
 
? ( 
 
 y
 
) y
 
 
   
a
 
 
 
 * 
 
y 
y
 
 
+
 
 
 
 
 
 a
 
   
 
(say) 
 ow the mean proportional  etween  
 
 an   
 
 
 v( 
 
 
 
) 
v
 
 
 a 
 
 (
 
 
 a
 
) 
 
 
 a
 
   
 
  olume generate   when ellipse is revolve  a out major axis  
 x      he  urve y
 
(a x) x
 
( a x) revolves a out the x axis  in  the volume generate   y the loop    
Sol
 
   he given  urve is  
y
 
(a x) x
 
( a x) 
 he require  volume generate   y the loop  
 ? y
 
 y
  
 
 
  ?
x
 
( a x)
(a x)
 x
  
 
 
  ? , x
 
  ax  a
 
 
 a
 
x a
- x
  
 
 
  * 
x
 
 
 
 a x
 
 
  a
 
x  a
 
log(x a) +
 
  
  a
 
, log   - 
 x     in  the volume generate   y the revolution of the loop of the  urve y
 
 (a x) x
 
(a x) a out the x axis    
Sol
 
   he given  urve is y
 
(a x) x
 
(a x) 
 he require  volume generate   y the loop  
 ? y
 
 x
 
 
 
  ?
x
 
(a x)
a x
 
 
  x 
 ? , x
 
  ax  a
 
 
 a
 
a x
- x
 
 
 
  * 
x
 
 
  a
x
 
 
  a
 
x  a
 
log(a x)+
 
 
 
  *
a
 
 
 a
 
  a
 
  a
 
log a  a
 
loga+  * 
 a
 
 
  a
 
log +   
 
[log  
 
 
]  
 x     in  the volume of the soli  generate   y the revolution  of the loop  of the  urve y
 
 x
 
(a x) a out the 
x axis  
Sol
 
    he given  equation is y
 
 x
 
 (a x) 
 ? y
 
 
 
  x  ? x
 
 
 
(a x) x  *
 
 
ax
 
 
x
 
 
+
 
 
  a
 
 [
 
 
 
 
 
] 
 
  
 a
 
 
 x     in  the volume of the soli  generate   y the revolution of the  urve y 
a
 
(a
 
 x
 
)
 a out its asymptote  
Sol
 
    he given equation of the  urve is  
y 
a
 
(a
 
 x
 
)
          or          x
 
y a
 
(a y) 
 he require  volume  
  ? y
 
  x   ?
a
 
(x
 
 a
 
)
 
  x
 
 
 
 
 
Putting x atan  
    x ase 
 
    
 he require  volume  
   a
 
?
se 
 
   
se 
 
 
  /
 
   a
 
? os
 
   
  /
 
 
 
 
 
 
a
 
  ( erify ) 
 x    Prove that the volume of the soli  generate   y revolving the asteroi  x
 
 
 y
 
 
 a
 
 
 a out the x axis is 
  
   
 a
 
 
Solution  he given  urve is  
x
  /
 y
  /
 a
  /
 
 he require  volume 
  ? y
 
 x
 
 
   ? (a
  /
 x
  /
)
 
 x
 
 
 
 
 
 
Free c 
 
Putting x asin
 
  
  x  a sin
 
  os    
   ? a
 
 os
 
  a sin
 
  os   
   
 
   a
 
? sin
 
  os
 
   
   
 
  
   a
 
 
 .
 
 
/ ( )
  .
  
 
/
 
  
   
 a
 
 
 x    Show that the volume of the soli  generate   y the revolution of the  urve (a x)y
 
 a
 
x a out its asymptote 
is
 
 
 
 
a
 
   
Solution    he given  urve is 
(a x)y
 
 a
 
x 
 he require  volume  
  ? (a x)
 
 
 
 y 
   ? *a 
ay
 
a
 
 y
 
+
 
 
 
 y   ?
a
 
(a
 
 y
 
)
 
 y
 
 
   a
 
?
 y
(a
 
 y
 
)
 
 
 
 
Put y a tan  
  y ase 
 
    
  he require  volume  
   a
 
?
ase 
 
   
a
 
(  tan
 
 )
 
  /
 
   a
 
?
  
se 
 
 
  /
 
   a
 
? os
 
   
  /
 
   a
 
 
 
 
 
 
 
 
 
 
 
 
a
 
  
 x     in  the volume of the soli  generate   y the revolution of the  issoi  y
 
( a x) x
 
 a out its asymptote   
Solution  he given  urve is  
y
 
( a x) x
 
 
 he require  volume  ? ( a x)
 
 y
 
 
   ? ( a x)
 
 
 
  
  
  x 
 ow y
 
( a x) x
 
 
or      y v(
x
 
 a x
) 
 
 y
 x
 
( a x)
  /
 
 
x
  /
  
   
 
 
 
( a x)
    
( a x)
 
 x
  /
( a x) x
  /
 ( a x)
  /
 
 
 y
 x
 
x
  /
( a x)
( a x)
  /
                           y 
x
  /
( a x)
( a x)
  /
 x 
 en e the require  volume  
   ? ( a x)
 
  
   
x
  /
( a x)
( a x)
  /
 x 
   ? ( a x)
  
 
v( ax x
 
) x 
   ? ( a  a sin
 
 )
   
 
 a sin  os    a sin  os          (Put x  a sin
 
   x  a sin  os   )  
    a
 
? (   sin
 
 )
   
 
sin
 
  os
 
     
    a
 
*? sin
 
  os
 
   
   
 
? sin
 
  os
 
   
   
 
+  
    a
 
*  
 (  / ) (  / )
   ( )
  
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(
 
 
 
 
 
 
 
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   he given  urve is r a (   os ) 
 en e the require  volume  
 ?
 
 
 r
 
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 ote  he volume of the soli  forme   y the revolution of the  urve r a   os (a  )a out the initial line is 
 
 
 a(a
 
  
 
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27 docs|150 tests

FAQs on Volume And Surfaces Of Solids Of Revolution - Topic-wise Tests & Solved Examples for Mathematics

1. What is the formula for finding the volume of a solid of revolution?
Ans. The formula for finding the volume of a solid of revolution is given by V = π∫(f(x))^2 dx, where f(x) represents the function that defines the curve being revolved.
2. How do you find the surface area of a solid of revolution?
Ans. To find the surface area of a solid of revolution, the formula S = 2π∫f(x)√(1+(f'(x))^2) dx is used. Here, f(x) represents the function defining the curve, and f'(x) is its derivative.
3. Can you explain the concept of a solid of revolution?
Ans. A solid of revolution is formed by rotating a curve or region around a fixed axis. The resulting three-dimensional shape is symmetrical, resembling a solid formed by rotating the curve. For example, rotating a parabolic curve around the x-axis generates a solid resembling a vase.
4. Are there any specific conditions for using the formulas for volume and surface area of solids of revolution?
Ans. Yes, the formulas for volume and surface area of solids of revolution assume that the curve being rotated is continuous and smooth. Additionally, the axis of rotation must be known, and the interval of integration should cover the entire region of interest.
5. How can the formulas for volume and surface area of solids of revolution be applied in real-life situations?
Ans. The formulas for volume and surface area of solids of revolution have practical applications in various fields. For instance, they can be used to determine the volume and surface area of objects such as bottles, vases, and containers with curved shapes. These calculations are essential in fields like manufacturing, design, and engineering.
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