1.

A house has 3 tube lights of 20 watts each, On the average, all the tube lights are kept on for five hours. Find the energy consumed in 130 days.

Answer»

Solution :NUMBER of TUBE lights =3
Wattge = 20 watts each
CONSUMED hours = 5 hrs
Energy `= (3 XX 20 xx5)/(1000)`
`= (300)/(1000)` KWH
= 0.3 KWH
Consumed energy for 30 days
`= 0.3 xx 30 = 9` KWH (or) 9 units.


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