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.
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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)
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