A rectangular paving stone has a length of 600 mm, to the nearest 20 mm, and a width of 300 mm, to the nearest 10 mm.
Work out the lower bound for the perimeter of the paving stone.
Work out the upper bound for the area of the paving stone.
193 exam-style questions on CCEA GCSE Maths Bounds. Each one has a worked solution and a mark scheme showing where the marks go.