Question

An electric heater is rated 2kw, 250 V . Find the cost of running this heater for 3 hours at Rs.1.50 per unit?
full explanation please​

Answer 1

Answer:

₹ 9

Explanation:

Electric heater rated 2kw that means it consumes 2000Watts for hour i.e., it takes 2units for an hour.

As mentioned, it turned for 3hours so the resultant power follows:

2 * 3 = 6kw

It consumes 6kw of power while it turned for three hours i.e.,6 units for 3hrs.

As the company charges ₹ 1.50 per unit then the number of cost will be calculated by product of charge multiply with units :

1.50 * 6 = 9.Rs

The company collects Rupees of 9 ( ₹ 9)

FOR BETTER UNDERSTANDING:

Let us take 3kwh,250V rated application then the company charges Rs.20 per unit.

While running it for half of the day then, 12hrs the company collects:

3*12=36units

36*20=720.Rs

Rupees of 72 they collect.

Thanks for your question.

Answer 2

Answer:

The cost of running this heater for 3 hours is

Explanation:EE= 3×2kWh is equal to 6kWh=6000Wh= six units. So the cost is ₹(1.5×6)=