A solid cylindrical rod of brass, 1 m long and 4 cm in diameter
MATHEMATICS · Multi-part · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes
Problem
A solid cylindrical rod of brass, 1 m long and 4 cm in diameter, is melted and recast into a hollow spherical shell whose external radius is 9 cm. (Assume no loss of material.)
(i) Find the thickness of the shell, correct to two decimal places.
(ii) If the density of brass is 8.5g/cm3, calculate the mass of the shell in kilograms, correct to one decimal place.