A solid metal cylinder has a radius of r r\,r cm and a height of 15 cm.
The volume of the cylinder is 540π 540\pi\,540π cm3^33.
Find the value of rrr.
Practise OCR GCSE Maths Cylinders with exam-style questions for Foundation and Higher tier. 98 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.