A metal pipe 40 cm long has outer radius 3.5 cm and inner radius 3.0 cm

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

A metal pipe 40 cm long has outer radius 3.5 cm and inner radius 3.0 cm. The density of the metal is 7.8 g per cm

^{3}

. Calculate the mass of the pipe, giving your answer in kilograms correct to two decimal places. (Use

\pi=\dfrac{22}{7}