Anthony travels from Newcastle to Manchester at an average speed of k k\,k miles per hour. The journey takes him 2 hours and 15 minutes.
Declan makes the same journey in 2 hours and 35 minutes.
Work out Declan's average speed for the journey in terms of kkk.
If Declan took different roads than Anthony, how could this affect your answer to part (a)?
203 exam-style questions on OCR GCSE Maths Speed and Density. Each one has a worked solution and a mark scheme showing where the marks go.