Volume of a cylinder = \pir\(^2\)h First convert 3m to cm by multiplying by 100 Volume of External cylinder = \pi \times 13\(^2\) \times 300 Volume of Internal cylinder = \pi \times 10\(^2\) \times 300 Hence; Volume of External cylinder - Volume of Internal cylinder Total volume (v) = \pi (169 - 100) \times 300 V = \pi \times 69 \times 300 V = 20700\picm\(^3\)