Answer:
The power of the pump is 337.5 W.
Step-by-step explanation:
Power is the rate of transfer of energy or the rate at which work is done. It is measured in watts (W).
Power =

But the energy here is the kinetic energy (K.E), which is the energy possessed by a moving body or object.
K.E =
m

where m is the mass = 90 kg and v is the velocity = 15 m/s.
K.E =
× 90 ×

= 10125 Joules
K.E = 10125 J = 10.125 KJ
So that the power of the pump when t = 30 s is;
Power =

= 337.5 W
The power of the pump is 337.5 W.