Question

7. A cylinder is open at one end. The external
diameter is 10 cm and thickness 2 cm if the height
is 8cm (a) capacity of cylinder (b) volume of
metal used.​

Answer 1

Answer:

a)capacity of the cylinder = 512π cm^3

b)volume of metal used = 288π cm^3

Step-by-step explanation:

volume of cylinder = π(r^2)h

a)

to find capacity of the cylinder, we consider the inner radius = 10-2 = 8cm

So,

capacity = π * (8^2) * 8

= π * 64 * 8

= 512π (REPLACE π BY 22/7)

b) volume of metal used = volume of outer - volume of inner cylinder

= π * (10^2 -8^2) * 8

= π * (100 - 64) * 8

= π * 36*8

= 288π. (REPLACE π BY 22/7)