Question

Two bulb of 100w each and two coolers of 250w each work for 6 hours a day. If cost of energy is rs 1.75 per kwh. Calculate the monthly bill.

Answer 1

Answer:We know , power = energy / time =>energy = power × time

two bulbs = 100×2=200W per day

two coolers = 250×2=500W per day

They work 6 hour per day. So the energy consumed in 1 day :-

Bulbs = > 200×6=1200W/h=> 1.2KW/h

Coolers=>500×5=2500W/h=>2.5KW/h

Total energy consumed = 3.7KW/h

1 unit = 1KW/h

1unit cost 1.75

3.7unit =?

=>3.7×1.75=6.475rupees will ne the monthly bill

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Explanation: