Question

The thickness of a hollow metallic cylinder is 2 cm. It is 42 cm long and its

inner radius is 10 cm. Find the volume of metal required to make the cylinder,

assuming it is open at both the ends . ​

Answer 1

Answer:

height(h)=35 cm; inner radius(r)= 12cm; thickness(t)=2 cm; outer radius(R)=t+r=12+2=14cm.

Answer 2

2cm

10-2=8cm

volume= π(10²-8²)h

= a²-b²= a+b)(a-b)

=22/7*36*42

= 22*36*6

= 132*36= 4752 cm²