Quant Question Of The Day: 244
A can do a certain work in 20 days. He workd for 4 days and then B completes the remaining work in 8 days. What is the time taken by to complete the twice work, if they work together?
- 6.67 days
- 6 days
- 10 days
- 13.33 days
Answer: (4) 13.33 days Solution let’s say work is 20 units rate of A = 20/20 = 1 unit a day now A does 4 units of work in 4 days. Remaining work = 16 units, b does in 8 days, hence rate of b = 2 units/day now combined rate of A and B = 1+2 = 3 units/day so number of days when they work together = 20/3 = 6.66 days So twice the work will be don is 13.33 days
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