Question

An electrical company charges 15 p per unit of energy (kWh).

Answer 1

Answer:

180 p

Explanation:

Energy refers to the capacity of doing work.

Amount charged by an electrical company = 15 p per unit of energy (kWh)

As 1 W = 1000 kW,

$500W=\frac{500}{1000}kW=0.5\,kW$

Also, 1 day = 24 hours.

Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = $15\times 0.5=7.5\,p$

Therefore,

cost of running a 0.5 kW freezer for a day ( 24 hours ) = $7.5\times 24=180\,p$

Amount charged by an electrical company = 15 p per unit of energy (kWh)

As 1 W = 1000 kW,

$500W=\frac{500}{1000}kW=0.5\,kW$

Also, 1 day = 24 hours.

Cost of running a 500 W freezer = 0.5 kW freezer for 1 hour = $15\times 0.5=7.5\,p$

Therefore,

cost of running a 0.5 kW freezer for a day ( 24 hours ) = $7.5\times 24=180\,p$