Subject :IMO Class : Class 8
If x varies directly as y2 and x = 4 when y = 5, then find x when y is 15.
A 4
B 9
C 12
D 36
If x varies directly as y2 and x = 4 when y = 5, then find x when y is 15.
A 4
B 9
C 12
D 36