Sam rowed 1.5 km in 6 minutes and 50 seconds.
He assumes he can row 5 km at the same speed.
Work out how long it would take Sam to row 5 km.
Give your answer in minutes and seconds to the nearest second.
Sam's speed actually decreases the further he rows.
How does this affect your answer to part (a)?
Practise OCR GCSE Maths Speed and Density with exam-style questions for Foundation and Higher tier. 52 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.