Answer:
(a) Energy consumed by five bulbs
units
Energy consumed by 1 heater
Energy consumed by electric iron
Total energy consumed by them
=( 2 + 3 + 5) = 10 units
(b)1unit or kWh = 3.6 x 106J
10 units = 3.6 x 106 x 10 J = 3.6 x 107J
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