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fahrenheit equals to celsius problem

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by joegreentea » Sat Sep 18, 2010 6:08 am
The temperature in degrees Celsius(C) can be converted to temperature in degrees Fahrenheit (F) by the formula F = 9/5C + 32. What is the temperature at which F = C?

(1) 20
(2) 32/5
(3) 0
(4) -20
(5) -40

Answer is E, but can anyone explain?
Thank you.
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by kvcpk » Sat Sep 18, 2010 6:38 am
F=9/5C + 32

when F = C,

C = 9/5C +32
4/5C = -32
C = -32*5/4 = -40

pick A.

Hope this helps!!
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by joegreentea » Sat Sep 18, 2010 8:07 am
kvcpk wrote:F=9/5C + 32

when F = C,

C = 9/5C +32
4/5C = -32
C = -32*5/4 = -40

pick A.

Hope this helps!!
Superb!
Thanks.
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by gmatmachoman » Tue Sep 21, 2010 2:29 am
joegreentea wrote:
kvcpk wrote:F=9/5C + 32

when F = C,

C = 9/5C +32
4/5C = -32
C = -32*5/4 = -40

pick E

Hope this helps!!
Superb!
Thanks.
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by selango » Tue Sep 21, 2010 2:32 am
Blimey..Once upon a time in school days,we need to mug up this formula for conversion.

But now we are given the formula and asked us to convert:)
--Anand--
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