Physics

Problem

Electricity is charged at Rs

5

per kWh. A student wishes to use an electric heater for

3\,\text{h}

each day but wants to keep the monthly (30-day) cost below Rs

450

. What is the maximum power rating the heater can have? a)

0.5\,\text{kW}

1.5\,\text{kW}

1\,\text{kW}

2\,\text{kW}