Question

A certain household consumes $250units$ of electric energy in a month. The energy consumed in mega joules $\left(MJ\right)$ is :

• A. $900MJ$
• B. $750MJ$
• C. $2250MJ$
• D. $1750MJ$

Answer 1

The correct option is A

$900MJ$

1. We are given that a certain household consumes$250units$of energy during a month.
2. This means that their energy consumption is $250kWh$.
3. We also knows that: $1kWh=3.6\times {10}^{6}J$
   $\Rightarrow 250kWh=250\times 3.6\times {10}^{6}J=900\times {10}^{6}J=9\times {10}^{8}J$.
4. Therefore, this household consumes $9\times {10}^{8}J$ or $900MJ$ of energy in a month.

Hence, the correct answer is option (A) i.e. $900MJ$.