It takes 5 machines 6 hours to produce 1000 DVDs
Work out how long it would take 4 machines to produce 1000 DVDs.
Practise OCR GCSE Maths Direct and Inverse Proportion with exam-style questions for Foundation and Higher tier. 96 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.