Q. |
Raj and Rik together can complete a piece of work in 6 days and the same work can be completed by Rik alone in 10 days. In how many days can Raj alone complete the work? |
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A. 15 |
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B. 20 |
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C. 25 |
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D. 30 |
Let the total work to be completed = 30 units (LCM of 10 & 6)
They together can complete 5 units per day
Rik alone does 30/10 = 3 units
Raj does 5- 3 = 2 units per day
Raj can complete the work alone in 30/2 = 15 days