Question

100watt Electric bulb is lighted for 2hours everyday and five 40watt tubes are lighted for 4 hours everyday calculate the energy consumed for 60 days

Answer 1

For the bulb,

100watt×2×60×60=(3600×200)÷1000

720watt for 1 day

Now for the tubes

40watt×4×60×60 = (160×3600)÷1000

576watt for 1 day

Total consumption for 1 day = 720+576 = 1296watt

Now for 60 days = 1296×60 = 77,760kW

In commercial terms

21.6units