This is a problem from TOMATO Problem number 2, useful for ISI and CMI entrance exam based on Men and Job.
Problem:
If m men can do a job in d days, then the number of days in which m+r men can do the job is
(A) d+r; (B) ; (C)
; (D)
;
Discussion:
If m men can do a job in d days,
Then m men does job in 1 day
Then 1 man does job in 1 day
Then m+r men does job in 1 day
Then m+r men does 1 job days.
Hence answer is days (D)
This is a problem from TOMATO Problem number 2, useful for ISI and CMI entrance exam based on Men and Job.
Problem:
If m men can do a job in d days, then the number of days in which m+r men can do the job is
(A) d+r; (B) ; (C)
; (D)
;
Discussion:
If m men can do a job in d days,
Then m men does job in 1 day
Then 1 man does job in 1 day
Then m+r men does job in 1 day
Then m+r men does 1 job days.
Hence answer is days (D)