David swam 400 metres in 9 minutes and 10 seconds.
He assumes he can swim 1500 metres at the same speed.
Work out how long it would take David to swim 1500 metres.
Give your answer in minutes and seconds to the nearest second.
David actually swims faster as he warms up, meaning his speed increases.
How does this affect your answer to part (a)?
Practise Edexcel GCSE Maths Speed and Density with exam-style questions for Foundation and Higher tier. 52 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.