Question

m is directly proportional to r^3 When r = 4, m = 160. Work out the value of r when m = 540

Answer 1

Step-by-step explanation:

m = k r^3

160=k 4^3

160= k 64

160/64=k

k= 02.5

m=k r^3

540= 2.5 r^3

r^3=540/2.5

r^3= 216

r= 6

MARK AS BRAINLIEST

Answer 2

Answer:

m=20

r=6

Step-by-step explanation: