Question

Q.13 If cost/KWh is Rs.2, then cost of operating two 100 watt fans for 10 hours is: A) Rs.4 C) Rs.6 B) Rs.2 D) Rs. 1​

Answer 1

Answer:

answer is 4

Explanation:

for 1 hour , 0.2kWh

for 10 hour,2kWh

cost = 4Rs.

Answer 2

Explanation:

Energy=power(watt) ×time(hours)÷1000

power=Energy supplied÷time

Energy=200×10=2000Js

Energy =2000÷1000=2kwh

cost of 1kwh =Rs2

cost of 2 kwh=2×2=4Rs