Question

An electric heater of 1000W is used for 3 hours a day. What is the cost of using it for the month of 25 days, if one unit costs Rs. 4??​

Answer 1

Explanation:

energy consumed by heater of 1000W for 2h in one day=1000/1000×2 =2units

number of units=W×h×day/1000

energy consumed by heater in 25 day

2×25=50units

cost of 1unit =RS 4

cost of 5unit=4×50=RS 200

hope it will help you

Answer 2

ANSWER

Here,

P= 1000W

We know that,

1kW = 1000W

=> P=1kW

and,

Time = 3×25h = 75h

Therefore,

Total energy consumed= Power×Time

= 1kW × 75

= 75kWh

As, cost of 1kWh = Rs. 4

So, cost of 75kWh = 4×75 = Rs. 300

THANKS