Question

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4. The circumference of the base of a cylinder is 88 cm and its height is 15 cm. Find the volume of
the cylinder.
5. Find the curved surface area and total surface area of a right circular cylinder with radius 7 cm
and height 15 cm.
6. The volume and curved surface area of a cylinder are 1650 cm’and 660 cm² respectively. Find the
radius and height of the cylinder.
7. The areas of three adjacent faces of a cuboid are x, y, and z. If the volume is V, prove that V2 = xyz. Men
8. A rectangular water reservoir contains 105 m² of water. Find the depth of water in the reservoir,
if its base measures 12 m x 3.5 m.
Ma
9. The breadth of a room is twice its height and half its length and the volume of the room is
512 cm. Find its dimensions.​

Answer 1

Answer:

4.volume=9240

5.curved surface area=660

surface area=968

Step-by-step explanation:

4.height of cylinder=15cm

circumference of circle=88cm

2πr=88

r=88*7/44

r=14cm

volume of cylinder=πr*r*h

=22/7*14*14*15

=22*2*14*15

=9240cmcube

5.radius of cylinder=7cm

height of cylinder=15cm

C.S.A of cylinder=2πrh

=2*22/7*7*15

=44*15=660cmsquare

Surface area of cylinder=2πr(h+r)

=2*22/7*7(7+15)

=44*22

=968cmsquare