Question

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

Answer 1

1 unit = 1 Kwh
1 kWh = 3.6·10⁶ J
So, 250 units = 250 * 3.6 * 10⁶  = 900 * 10⁶ J

Answer 2

Given,

Total units of energy consumed by a certain household during a month = 250 units

To find,

Total energy consumed by the household, in joules.

Solution,

We can simply solve this numerical problem using the following process:

As per the units of conversion of electricity,

1 electrical unit of energy = 1 kWh = 3.6 x 10^6 joules

Now, total energy consumed by the household, in joules is equal to:

= 250 units

= 250 kWh

(Since, 1 electrical unit of energy = 1 kWh)

= 250 x 3.6 x 10^6 joules

(Since, 1 kWh = 3.6 x 10^6 joules)

= 9 x 10^8 joules of energy = 9 x 10^8 J

Hence, the total energy consumed by the household, in joules, is equal to 9 x 10^8 joules of energy.