With one unit of electricity (one kilowatt hour), a 100 W
bulb can burn for
1 1 hour
2 5 hours
3 10 hours
4 20 hours
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Answer Posted / vishnu.a
10 hours is the correct one because 100w=.1kwhr.so
.1 unit=.l kwhr
.1x10 unit=1 unit
.16 kwhr x60 mint = 1 unit
1000\60=16.65 hr
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