1 Crore+ students have signed up on EduRev. Have you? Download the App 
Find the volume of a cuboid whose length is 8 cm, breadth 6 cm and height 3.5 cm.
Explanation:
Length of the cuboid = 8 cm
Breadth of the cuboid = 6 cm
Height of the cuboid = 3.5 cm
Volume of the cuboid = length × breadth × height
= 8 x 6 x 3.5 = 168cm^{3}
Therefore,volume of the cuboid = 168cm^{3}
Explanation:
Area of a parallellogram = Base x Height = 4 x 2.5 = 10 cm^{2}
Find the volume of a cuboid whose length is 8 cm, width is 3 cm and height is 5 cm.
:Length of the cuboid = 8 cm
Width of the cuboid = 3 cm
Height of the cuboid = 5 cm
Volume of a cuboid = length × breadth × height
Therefore, Volume of the given cuboid = 8x3x5 = 120 cm^{3}
Find the perimeter of a rectangle whose length is 4 cm and breadth is 3 cm.
Explanation:Length of the rectangle,l = 4cmBreadth of the rectangle,b = 3 cmPerimeter of a rectangle = 2(l+b) = 2(4+3) = 2x7 = 14 cm
Explanation:Area of a rhombus = Half the product of its diagonals = 1/2 x d_{1}x d_{2}
Area of a trapezium = Half of the sum of the lengths of parallel sides × ______
Explanation:Area of a trapezium =( Half of the sum of the length of parallel sides )×(perpendicular distance between them)
Explanation:Surface area of a cuboid = 2(lb + bh + hl)where, l= lengthb = breadthand h = height
Explanation:The surface area of a threedimensional figure is the sum of the areas of all its faces.
In a right angled triangle, find the hypotenuse if base and perpendicular are respectively 36015 cmand 48020 cm.
Let hypotenuse = x cm
Then, by Pythagoras theorem:
x^{2} = (48020)^{2} + (36015)^{2}
x fi 60025 cm
The inner circumference of a circular track is 440 cm. The track is 14 cm wide. Find the diameterof the outer circle of the track.
Let inner radius = A; then 2pr = 440 \ p = 70
Radius of outer circle = 70 + 14 = 84 cm
Outer diameter = 2 × Radius = 2 × 84 = 168
A pit 7.5 metre long, 6 metre wide and 1.5 metre deep is dug in a field. Find the volume of soilremoved in cubic metres.
Volume of soil removed = l × b × h
= 7.5 × 6 × 1.5 = 67.5 m^{3}
The whole surface of a rectangular block is 8788 square cm. If length, breadth and height are inthe ratio of 4 : 3 : 2, find length.
Let the common ratio be = x
Then, length = 4x, breadth = 3x and height = 2x
As per question;
2(4x x 3x + 3x x 2x + 2x x 4x) = 8788
2(12x2 + 6x2 + 8x2) = 8788 fi 52x2 = 8788
fi x = 13
Length = 4x = 52 cm
Find the height of a Cuboid , if the volume and area of its base is 1240cm3 and 40 sq.cm respectively.
A bicycle wheel makes 5000 revolutions in moving 11 km. What is the radius of the wheel?
Let the radius of the wheel be = p
Then 5000 × 2pr = 1100000 cm fi r = 35 cm
The short and the long hands of a clock are 4 cm and 6 cm long respectively. What will be sum ofdistances travelled by their tips in 4 days? (Take p = 3.14)
In 4 days, the short hand covers its circumference
4 × 2 = 8 times long hand covers its circumference
4 × 24 = 96 times
Then they will cover a total distance of:
(2 × p × 4)8 + (2 × p × 6)96 fi 3818.24 cm
165 videos157 docs134 tests

165 videos157 docs134 tests
