Question
A, B, C and D are four workers. The ratio of efficiency of C and D is 3 : 4 and that of A and B is 1 : 2. Find the time taken by D to finish the job alone.
A, B, C and D are four workers. The ratio of efficiency of C and D is 3 : 4 and that of A and B is 1 : 2. Find the time taken by D to finish the job alone.
I. A and D work together and finish the job in 12 days.
II. A, B and C together complete the job in 10 days.
III. B and D together finish the job in 10 days.
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