Question

Beginning with the second day, the amount of work
Ram can do per day keeps doubling everyday he
works. Saleem can always do the work done by
Ram in 40% less time. Owing to this increasing
ability, Saleem and Ram complete the job together
in 2 days. How many days would it have taken if
their efficiencies had remained constant?
(A) 4
(B) 6
(C) 5
(D) 3​

Answer 1

Answer:

3

Step-by-step explanation:

Let the d be the number days taken by Ram to complete the work initially

Since he works for two days therefore he does 1/d + 2/d of the work (double on the second day).

Saleem does 1/0.6d + 2/0.6d of the work( since he does the work in 40% less time than ram.

total work done is sum of work done by saleem and ram. d=8

Ram takes 8 days and saleem takes 8*0.6 days to complete the work.

Total days if the efficiency remains same 8*4.8/8+4.8 = 3 days