In a house 5 bulbs, rated as 220V-100W are used 8 hours daily.Find the expenditure for 30 days at the rate of ₹2 per unit.
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Answer:
The expenditure for 30 days will be Rs. 240
EXPLANATION:
Wattage reading for 5 bulbs= 5x100= 500W
Reading for 8 hours a day= 500x8=4000
Reading for 30 days= 4000x30= 120000
no. of units used= 120000/1000= 120Units
Therefore total cost = 120x2= Rs. 240/-
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