A is thrice as good as workman as b and therefore is able to finish a job in 60 days less than
b. Working together, they can do it in:
a. 20 days
b. 22 1 days 2
c. 25 days
d. 30 days
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option b . 22 1 and 2 days will be the
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Answer is (B)
Explanation:
Ratio of times taken by A and B = 1 : 3.
The time difference is (3 - 1) 2 days while B take 3 days and A takes 1 day.
If difference of time is 2 days, B takes 3 days.
If difference of time is 60 days, B takes =(3/2 x 60) = 90 days.
So, A takes 30 days to do the work.
A's 1 day's work = 1
/30
B's 1 day's work = 1
/90
(A + B)'s 1 day's work = 1/30 + 1/90 = 4/90 = 2/45
A and B together can do the work in 45/2= 22 1/2 days.
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