Question

An electric appliance of power 1.5 kW is used 7 hours a day calculate
a) Electric energy consumed in a day.
b) Electric energy consumed in a month of January.
c) Cost of energy at the rate of 4.80 per kWh.​

Answer 1

$(a)Electric \: energy \: consumed \: in \: a \: day \: = 1.5 \times 7 = 10.5kWh \\ (b)Electric \: energy \: consumed \: in \: a \: month \: of \: January = 10.5 \times 31 = 325.5kWh \\ (c)cost \: of \: energy \: at \: rate \: at \: the \: end \: of \: month = ₹1562.4$