Physics

Problem

An electric heater rated

2\,\text{kW}

is operated for

3\,\text{h}

each day for seven consecutive days. If electrical energy costs Rs.

6.50

per unit

(1\,\text{unit}=1\,\text{kWh})

, the total cost for the week is closest to a) Rs.

126

b) Rs.

195

c) Rs.

273

d) Rs.

91