A water pump works in two stages

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A water pump works in two stages. In the first stage it operates at

500\,\text{W}

for

4\,\text{min}

. In the second stage its power increases to

1.2\,\text{kW}

for the next

2\,\text{min}

. Calculate the total work done by the pump during the entire

6\,\text{min}

operation.