a cylindrical drum of diameter 56 cm contains 123.2 litres of oil when full. Find…

a cylindrical drum of diameter 56 cm contains 123.2 litres of oil when full. Find the height of the drum in centimeters

Correct Answer: Option D

Explanation

V = (pi r^2 h)
= 123.2 x 1000
= (frac{22}{7}) x 28 x 28 x h
= 123200 = 88 x 28h
= 2464h
∴ h = (frac{123200}{2464})
= 50cm
N.B: 1 litre = 1 dm³
= 1000cm³