inverse variant problem Watch

bigmansouf
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Question: 3 similar lamps burn 4 gallon of oil in 100 hours. How much oil will 5 lamps burn in 60 hr?

I have struggled to find the answer
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HapaxOromenon3
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(Original post by bigmansouf)
Question: 3 similar lamps burn 4 gallon of oil in 100 hours. How much oil will 5 lamps burn in 60 hr?

I have struggled to find the answer
Clearly 5 lamps will burn more oil than 3, so the scale factor there is 5/3. Similarly since turning on a lamp for 100 hours will clearly burn more oil than for just 60 hours, the scale factor there is 60/100 = 6/10 = 3/5.
Hence the result is 4 gallons * 5/3 * 3/5 = 4 gallons * 1 = 4 gallons.
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the bear
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1 lamp will burn 4 gallons in 300 hours

1 lamp will burn 4/5 gallons in 60 hours

5 lamps will burn.... in 60 hours

:headfire:
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HapaxOromenon3
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(Original post by the bear)
1 lamp will burn 4 gallons in 300 hours

1 lamp will burn 4/5 gallons in 60 hours

5 lamps will burn.... in 60 hours

:headfire:
What's with the strange shaking head icon?
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the bear
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(Original post by HapaxOromenon3)
What's with the strange shaking head icon?
it is burning ?

:facepalm2:
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HapaxOromenon3
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(Original post by the bear)
it is burning ?

:facepalm2:
And WHY is that thing burning? In other words, what does that icon add to your message?
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bigmansouf
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(Original post by the bear)
1 lamp will burn 4 gallons in 300 hours

1 lamp will burn 4/5 gallons in 60 hours

5 lamps will burn.... in 60 hours

:headfire:
thanks luv the icon
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