Leah ran 2.7 miles in 13 minutes and 20 seconds.
She assumes she can run 7 miles at the same speed.
Work out how long it would take Leah to run 7 miles.
Give your answer in minutes and seconds to the nearest second.
Leah's speed actually decreases the further she goes.
How does 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.