Mathematics

Problem

A brass spherical shell has external radius

10\,\text{cm}

and internal radius

8\,\text{cm}

. If the density of brass is

7.5\,\text{g/cm}^3

, find the mass of the shell, correct to one decimal place. a)

18.8\,\text{kg}

15.3\,\text{kg}

10.2\,\text{kg}

30.7\,\text{kg}