If one unit of electricity is equal to using 1000 Watt (1 Kilowatt) for one hour, then what is the cost of using a 800 Watt electric iron for 2.5 hours if the cost of electricity is Rs.5 per unit.
a) Rs.8
b) Rs.16
c) Rs.20
d) Rs. 10
Answers
Answer:
Explanation:
The total number of hours=2*30=60
Total energy consumption=60*1,1= 66 kWh
Energy cost = 66*5= Rs 330
It is to be noted that the iron has a thermostat, which trips when the set temperature is reached. The thermostat also resets when the temperature falls. This results in a duty cycle with an “on” period followed by an “off” period. This would result in a substantially lower energy consumption.
The cost of using electric iron is 10 Rs. hence option (d) is correct choice.
One unit of electricity is equal to using 1000 Watt (1 Kilowatt) for one hour.
We have to find the cost of using a 800 Watt electric iron for 2.5 hours. if the cost of electricity is 5 Rs per unit.
First we should find out the total unit of electricity consumed by electric iron in 2.5 hours.
Energy consumed by electric iron = Power of electric iron × time taken.
Here,
- Power of electric iron = 800 watt
- Time taken = 2.5 hrs
Now, Energy consumed by electric iron = 800 × 2.5 = 2000 Kilowatt.
But, It is given that one unit of electricity = 1000 kilowatt.
∴ 2000 kilowatt = 2 units of electricity.
And the rate of electricity = 5 Rs per unit.
∴ the cost of using electric iron = 5 × 2 = 10 Rs.
Therefore the cost of using electric iron is 10 Rs. hence option (d) is correct choice.
Also read similar questions: in a house 4 electric bulbs of 40 watts burn for 5 hours, 2 bulbs of 60 watts for 6 hours and 3 fans of 80 watts for 6 h...
https://brainly.in/question/13427045
A 1000 watt heater is used for 1 hour everyday for 30 days.Find the cost of the electricity if the rate is Rs 3.0 per un...
https://brainly.in/question/2656584
#SPJ3