Answer:

It is given for heater,

P = 2kWh

T = 4 hours

Thus, Energy consumed will be E1, PT = 8kWh

It is given for TV,

P = 200 watt = 0.2kW

T = 4 hours

Thus, Energy consumed will be E2, PT = 0.8kWh

Also, for lamps,

P = 100 watt = 0.1kW

T = 4 hours

n = 3

Energy consumed will be E3, PTn = 1.2kWh

Thus, the amount of total energy consumed

E = E1 + E2 + E3

= 8 + 0.8 + 1.2 = 10kWh

Cost of 1kWh = Rupees 5.50

Thus, total cost = Rupees 55.