Question

Q.11 Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cin and
height is 7 cm. Whose volume is greater? Check whether the cylinder with greater volume also
has greater surface area?​

Answer 1

Answer:

for cylinder A

diameter-7cm

radius-7/2cm=3.5cm

height-14cm

Cylinder B

diameter-14cm

radius-14/2cm =7cm

height-7cm

now Volume of Cylinder A

V=πr×r×h

=22/7×3.5×3.5×14

=539cm3

Volume of cylinder B

V=πr×r×h

=22/7×7×7×7

=1078cm3

so the volume of cylinder B is greater than volume of cylinder A.

now

Surface area of Cylinder A

= 2πrh

=2×22/7×3.5×14

=308cm2

surface area of Cylinder B

=2πrh

=2×22/7×7×7

=308cm2

.so the surface area is same for cylinder A and B