M∝N ; M∝1√P.
∴M∝N√P
M=kN√P
when M = 3, N = 5 and P = 25;
3=5k√25
k=3
M=3N√P
when M = 2 and N = 6,
2=3(6)√Pimplies√P=182
√P=9impliesP=92
P = 81
