Direct and Inverse Proportion

The mass, $M$ , of a solid sphere is directly proportional to the cube of its radius, $r$ .

When $M = 3.125$ , $r = 0.5$

Find the value of $r\,$ when $M = 200$

[3]

The mass, $M$ , of a solid sphere is directly proportional to the cube of its radius, $r$ .

When $M = 3.125$ , $r = 0.5$

Find the value of $r\,$ when $M = 200$

[3]

Direct and Inverse Proportion Questions