Question

An iron pipe is 0.35 m long, its external and internal diameter are 8 cm and 6 cm respectively. The volume (in cc) of the pipe is (given $\pi =\frac{22}{7}$)

• A. 7700
• B. 11000
• C. 770
• D. 77

Answer 1

The correct option is C 770

Given,

$h=0.35m=35cm$

$D=8cm,d=6cm$

$R=4cm,r=3cm$

The volume of pipe will be

$=\pi (R^2-r^2)h$

$=\frac{22}{7}(4^2-3^2)\times 35$

$=\frac{22}{7}(16-9)\times 35$

$=770c{m}^2$

Hence, this is the answer.