Class 10 Exam  >  Class 10 Notes  >  Lab Manuals for Class 10  >  Viva Voce: Surface Area of a Cone

Viva Voce: Surface Area of a Cone | Lab Manuals for Class 10 PDF Download

Q.1. What is the radius of the base of a cone of height 6 cm and slant height 10 cm ?

8 cm.


Q.2. Find slant height of a cone of base radius 3 cm and height 4 cm.

5 cm.


Q.3. How many circular faces are there in a solid cone ?

One.


Q.4. What is the lateral surface area of a cone?

πrl , l= slant height, r— radius of base.


Q.5. What is the lateral surface area of a cone if its height is 2 times of the radius ?

5–√πr2


Q.6. Number of vertex of a cone is

One


Q.7. What is the total surface area of a cone ?

π r(l+r) , l= slant height, r= radius of base.


Q.8.  What is the relation between slant height and base radius of a cone?

l2 = h2 + r2 , l= slant height, r— radius of cone, h = height of cone.


Q.9. A conical tent is 10 m high and the radius of its base is 24 m, then its slant height
(a) 24 m
(b) 25 m
(c) 26 m
(d) none of these

Correct Option is (c) 


Q.10.  Curved surface area of a cone of base radius 7 cm is 308 cm2, then its slant height is
(a) 7 cm
(b) 14 cm
(c) 21 cm
(d) 28 cm

Correct Option is (b) 

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