Question

A certain household has consumed 240 units of energy during a month. How much energy is this in joules?

• A. $864\times {10}^{6}J$.
• B. $900\times {10}^{6}J$.
• C. $653\times {10}^{6}J$.
• D. $235\times {10}^{6}J$.

Answer 1

The correct option is A $864\times {10}^{6}J$.

1 unit of energy is equal to 1 kilowatt hour (kWh).
1 unit = 1 kWh
$1kWh=3.6\times {10}^{6}J$
Therefore, 240 units of energy $=240\times 3.6\times {10}^6=864\times {10}^{6}J$.