InterviewSolution
Saved Bookmarks
| 1. |
P alone can do 1/2 of a work in 6 days and Q alone can do 2/3 of the same work in 4 days. In how many days working together, will they finish 3/4 of the work? |
|
Answer» 1/2 of the work is done by P in 6 days ∴ Full work is done by P in 6/1/2 = 6 × 2 = 12 days 2/3 of work done by Q in 4 days. ∴ Full work done by Q in 4/2/3 = 4 × 3/2 = 6 days (P + Q) will finish the whole work in ab/(a+b) days = (12×6)/(12+6) = (12×6)/18 = 4 days (P + Q) will finish 3/4 of the work in 4 × 3/4 = 3 days |
|