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=30lw = 30lw=30l
Find the length of a wire weighing 75 grams.
50 exam-style questions on AQA GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.