Q. |
Rajesh can complete a piece of work in 20 days and the same work can be completed by Rakesh in 30 days. In how many days can they together complete the same work? |
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A. 6 |
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B. 10 |
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C. 18 |
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D. 12 |
Let the total work to be completed = 60 units (LCM of 20 & 30)
In one day Rajesh can do 3 units and Rakesh 2 units.
In 1 day, they together can complete 3 + 2 = 5 units
To complete 60 units, they will take 60/5 = 12 days