The diagram shows a cylindrical solar water tank. The tank has a top and a bottom.
8 of these tanks are going to be painted with a heat-reflective coating. Each tank has a diameter of 50 cm and a height of 2.2 m.
Each tin of coating can cover 6 m2.
How many tins of coating are needed to paint the 8 tanks?

92 exam-style questions on Edexcel GCSE Maths Cylinders. Each one has a worked solution and a mark scheme showing where the marks go.