MATHEMATICS · Multi-part · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes
Problem
A hollow cylindrical pipe is made of brass. The pipe is 120 cm long and has an external radius of 6 cm and an internal radius of 4 cm.
(i) Calculate the volume of brass used in the pipe in cm3.
(ii) If the density of brass is 8.5g/cm3, find the mass of the pipe in kilograms, correct to one decimal place.
(iii) The pipe is to be sold at the rate of Rs. 450 per kilogram. Determine the selling price of one such pipe.