Question

hollow cylinder pipe is made up of copper. it is 21 cm long inner and Outer dimensions 10 and 6 respectively. find volume of copper used in making pipe​

Answer 1

Answer :-

1056 cm³

Solution :-

Volume of hollow cylinder = $\pi$h ( r0 - ri ), where h is the height of the cylinder.

r0 is the outer radius and ri is the inner radius.

V = $\pi$ × 21 × ( 5² - 3² )

= 1055.57 cm²

Answer 2

Step-by-step explanation:

1056 cm² is the approximate answer. Hope it helps you!