Question

16. A house is fitted with 5 tubes each of 40 W. If all the tubes are lighted for 20 hours a
if the cost of electrical unit is 1.50, the total cost of electrical energy consumed is
A) 4
B) 260 C) 4.5
D) 5
LEN
200​

Answer 1

Explanation:

HEY MATE ......

The electrical power of a single tube in kilowatt = 1000 / 40 =0.040kW

➞ The electrical power of 5 tubes in kilowatt =0.2kW .

➞Total unit of power consumed =0.2×20=4kWh=4 units

➞ The cost of electricity consumed=4×0.50=Rs.2

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