A garden water butt is in the shape of a cylinder.
The water butt has a radius of 40 cm and a height of 90 cm.
Rainwater flows from a pipe into the empty water butt at a rate of 12.5 litres per minute.
Calculate the number of minutes it will take to completely fill the water butt. Give your answer correct to the nearest minute.
91 exam-style questions on OCR GCSE Maths Cylinders. Each one has a worked solution and a mark scheme showing where the marks go.