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In a premise 5 bulbs each of 100 W, 2 fans each of 60 W, 2 A.Cs each of 1.5 kW are used for 5 h per day. Find :(a) total power consumed per day,(b) total power consumed in 30 days,(c) totoal electrical energy consumed in 30 days.(d) the cost of electricity at the rate of Rs 6.25 per unit. |
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Answer» Power consumed by 5 bulbs = 5 × 100 = 500 W 2 fans = 2 × 60= 120 W 2 A.C = 2 × 1.5 x 1000 = 3000 W (a) Total power consumed per day = 3620 W (b) Total power consumed in 30 days = 3620/1000 × 30 = 108.6 kw (c) Electric energy is used for 5 h per day. Total electrical energy consumed in 30 days. (d) Cost of electricity = P × t = 108.6 × 5 = 543 kWh = 543 × 6.25 = Rs 3393.75 |
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