Rachel drives 300 miles from London to Newcastle.
She drives the first 165 miles at an average speed of 60 mph.
From this point it takes Rachel 3 hours and 15 minutes to complete her journey.
What was Rachel's average speed for the whole journey? Hence, calculate how many minutes longer the journey would have taken if Rachel had driven at an average speed of 40 mph for the whole journey?
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.