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3 March, 11:00

A pay meter in a holiday home supplies electricity at a cost of 12p per kWh and 10kWh would cost £1.20 how long could a 2kW heater be used for after £1.20 is put into the meter slot?

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  1. 3 March, 13:38
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    The heater uses 2kW per hour. You paid for 10kWh, hence you can use it for 2/10=5 hours
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