Question

200 watt motor is used for 180min. find elect ric bill if 1unit costs 1.5 rupees.​

Answer 1

Answer:

0.45 rupees

Explanation:

Given :

• Power rating of the electric motor = P = 200 watts

• Time for which the electric motor is used for = t = 180 min = 3 hours

• Cost of each unit = 1.5 rupees

To find :

• Electric bill if each unit costs rupees 1.5

Energy = power×time

Energy = 200×1.5

Energy = 300 wh

1 kwh = 1000wh = 1 unit

So the energy will be equal to 0.3 Kwh

Energy consumed by the motor is equal to 0.3 units

Cost = 0.3×1.5

Cost = 3/10×15/10

Cost = 45/100

Cost = 0.45 rupees

The electric bill is equal to 0.45 rupees