Question

The circumference of a 1 cm thick pipe is 44 cm. The level of water that 7 cm of pipe can hold is

• A. $798c{m}^3$
• B. $308c{m}^3$
• C. $792c{m}^3$
• D. $795c{m}^3$

Answer 1

Answer: (C)

$792c{m}^3$

Given that

$2\pi r=44$

$r=7cm$

So, the inner radius of the pipe $=7-1=6cm$

Therefore, the volume of the pipe

$=\pi r^{2}h$

$=\pi \times 6^2\times 7$

$=792c{m}^3$

Hence, this is the answer.