A certain number of workmen can do a piece of work in 25 days, in what time will another set of an equal number of men do a piece of work as great supposing that 2 men of the first set can do as much work in a hour as 3 men in the second set can do in an hour A. 60 days B. 75 days C. 90 days D. 105 days E. None of these

Interview Candidate
Jun 26th, 2005
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smart pointer

Jan 14th, 2006

ans : none of these , 37.5 days
no. of workers = x
set 1 : x persons = 25 days ,So x person in 1 day = 1/25
so 1 person in 1 day = 1/25x
set 2 : x persons = @ days, so x person in 1 day = 1/@
so 1 person in 1 day = 1/@x
But, (1/25x)2 = (1/@x)3
@ = 37.5 days.

Amit Bhatia

Feb 26th, 2006

USE FORMULA
M1*H1*D1*E1/W1 = M2*H2*D2*E2/W2
AS M1 = M2
D1=25
E2 = E1*2/3
W1 = W1 = 1
NO NEED FOR NO OF HOURS I.E H1 , H2
25*E1 = X*E1*2/3
X= 75/2
(E)