A pump on the ground floor of a building can pump up water to fill a tank of volume `30 m^3` in 15 min. If the tank is 60 m above the ground, and the efficiency of the pump is 40%, how much electric power is consumed by the pump?
(Take `g = 10 m s^(-2)`)

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Calculate the mass of water being pumped
The volume of water to be pumped is given as \( V = 30 \, m^3 \). The density of water is \( \rho = 1000 \, kg/m^3 \).

The mass \( m \) of the water can be calculated using the formula:
\[
m = \rho \times V
...