Question

M is directly proportional to r squared when r=2 m=14 work out the value of r when m = 224

Answer 1

32

Explanation:

r:m

2:14

1:7

m=224

r=224 divided by 7

224/7=32

Edit: unless it is proportional to r^2 in which case it is a different answer

Answer 2

m=504

Explanation: