Saved Bookmarks
| 1. |
Rashid can complete a job by himself in 15 days while kausik can do the same work alone in 21 days. If they work together how many days will it take them to complete the work?1. \(8\frac{3}{4}\)2. \(9\frac{1}{4}\)3. \(8\frac{1}{4}\)4. \(9\frac{3}{4}\) |
||||||||||||||||
|
Answer» Correct Answer - Option 1 : \(8\frac{3}{4}\) Given: work together how many days will it take them to complete the work? R can do work = 15 days K can do work = 21 days Concept used: Total work = LCM Formula used: Efficiency = Work/Time Calculations: Total work = LCM of 15 and 21 = 105
Then efficiency of R+K = 7 + 5 = 12 The efficiency of R ∶ K = 7 ∶ 5 ∴ Working together they completed the work in 8(3/4) days. |
|||||||||||||||||