The weight of a piece of wire (w w\,w grams) is directly proportional to its length (l l\,l cm).
w w\,w is given by the formula: w=24lw = 24lw=24l
Find the length of a wire weighing 84 grams.
189 exam-style questions on OCR GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.