Question

If an electric bulb of hundred Watts is lightened for 20 hours how much electrical energy will be consumed also find the cost of 1 unit cost rupees 4

Answer 1

An electric bulb have an 100W works 20 hr per day.

N = Pt÷1000-Wh/unit

= 100*20÷1000

= 2 units

Electric energy consumed per units = 2*4

= 8.

Therefore, an electric bulb takes Rs.8.00. per day.

if the condition was given for a month than it would be 62 units in a month. In this also, the month can contain maximum of 31 days. i assune it 31 days a month therefore, 62 units. One bulb takes 62 units then 2 bulbs would take 124 units. if it was 30 days than it would be 60 units for a single bulb it would be 120 units for two month in a month ( 30 days ).

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