The intensity of radiation, RRR, from a radioactive source is inversely proportional to the square of the distance, d d\,d cm, from the source.
R R\,R is given by the formula: R=162d2\displaystyle R = \frac{162}{d^2}R=d2162
Find the radiation intensity when the distance is 3 cm.
Practise Eduqas GCSE Maths Direct and Inverse Proportion with exam-style questions for Foundation and Higher tier. 96 questions, matched to the Eduqas GCSE Maths (C300QS) specification and written in Component 1 and Component 2 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.