It takes 4 machines 9 hours to manufacture a set of parts.
Work out how many hours it would take 6 machines to manufacture the same set of parts.
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.