P
|
=
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750W
(0.75kW)
|
t
|
=
|
10 minutes per day
is 10/60 (or 1/6) hours per day (1/6 x 365.25h per year)
This assumes that the hours in
a year is year is averaged out from the three years with 365
days and the fourth (leap year) with 366!)
|
= 0.75kW x 365.25
h = 45.66 kWh
6
therefore total cost 45.65625kWh
x 21p/kWh
= 958.8p
= 959p (rounding to the
nearest penny)
= £9.59
LOJ
Dec 2000
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