2014 · Q28
A, B and C can do a piece of work individually in 8, 12 and 15 days respectively. A and B start working, but A quits after working for 2 days. After this, C joins B till the completion of work. In how many days will the work be completed?
Elementary MathematicsArithmetic
- A5 8/9 days
- B4 6/7 days
- C6 7/13 days
- D3 3/4 days
Explanation
Work done in 2 days by A+B: 2(1/8+1/12) = 5/12; remaining 7/12 done by B+C at 3/20 per day: 35/9 days; total 2 + 35/9 = 53/9 = 5 8/9 days.