A student's room has a TV (250 W) ,heater (1150 W) and lamp (200 W) Electricity costs 10 fills per KWh. Calculate how much it would cost to run these three appliances for a…

Question

asked Oct 4, 2022 21.9k views

1 Answer

Jess Thrysoee · Answer 1 · 2022-10-08T23:54:22+0000

Answer:

Cost = 40 fills

Step-by-step explanation:

First, we will calculate the total power consumed by all appliances:

$Power = P_(TV)+P_(heater)+P_(lamp)\\Power = 250\ W+1150\ W+200\ W\\Power = 1600\ W = 1.6\ KW$

Now, we will calculate the energy required:

$Energy = (Power)(Time)\\Energy = (1.6\ KW)(2.5 h)\\Energy = 4 KWh\\$

Now, for the cost we use the following formula:

$Cost = (Energy)(Unit\ Cost)\\Cost = (4\ KWh)(10\ fills/KWh)\\$

Cost = 40 fills