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Q11.
An electricity company charges 4.8p per kilowatt hour of electricity. There is a monthly
standing charge of 拢11.70. The table shows the usage pattern in a small office
for the first quarter. Calculate their bill for this time.
|
Units used (kWh) |
|---|
| April |
863 |
| May |
1052 |
| June |
927 |
Answer and commentary
The units are in kWh, which is kilowatt hour. So each unit costs 4.8p.
First add up the total units:
863 + 1052 +927 = 2842
Now multiply by 4.8p
2842 x 4.8 = 13641.6p
This is in pence and the answer will have to be in pounds, so convert:
13641.6p = 拢136.42 (to the nearest penny)
We also have to pay 3 monthly standing charges.
That's 拢11.70 x 3 = 拢35.10. So, the total bill is 拢35.10 + 拢136.42 = 拢171.52
Answer: 拢171.52
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