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5 a = 3 b = 25

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by sanju09 » Fri Mar 04, 2011 1:18 am
If 5 a = 3 b = 25, then 30 a b =
(A) 50
(B) 100
(C) 625
(D) 1000
(E) 1250
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by Anurag@Gurome » Fri Mar 04, 2011 1:26 am
sanju09 wrote:If 5 a = 3 b = 25, then 30 a b =
(A) 50
(B) 100
(C) 625
(D) 1000
(E) 1250
5a = 25 and 3b = 25 => 6b = 50

Hence, 30ab = (5a)*(6b) = (25)*(50) = 1250

The correct answer is E.
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