Ranu2024 wrote:
@Bunnel :- please let me know why A is wrong.
If a household uses the light for 4 hrs/day its lifespan is for 6 months and again we need to purchase it. So on the longer run we won't save moneh whereas by using electronic lamps we could save it as its lifespan is for 14 yrs if used for same hrs.
Kindly correct myrationale.
Posted from my mobiledevice
I think its incorrect because if the household use the 100 watts for 6 hours( instead of 4) it will last for less than 6 months. Similarly if they use the new 25 watt bulb for 6 hours, it will last for less that 14 years, assuming that they both work in the same capacity.
It might end up that one might need 4, 25 watts unlike the single 100 watt bulb, thus no longer equally efficient.
So IMO A, is incorrect and E seems to be the right answer.
Not sure it this helps
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Statistics : Posted by Aashi108 • on 02 May 2024, 01:30 • Replies 6 • Views 901
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