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Aptitude
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Verbal Reasoning
Computer Science
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Simplification
If 3x= 4y= 12 , then z is equal to
xy
x + y
xy/x+Y
4x +3y
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Correct Answer:
xy/x+Y
Explanation:
Taking log of all 3 we get
xln3 = yln4 =
zln12 = k
z = k/ln12 = k / ln(
3*4) = k/ln3 + ln4 = k / (k/x +k/y) = xy / (x+y)
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