Rohan takes twice the time taken by Sohan to complete a piece of work and half of the time taken by Mohan to complete the work. If all of them working together can complete the work in 12 days, in how many days Rohan and Sohan working together can complete that work?

Rohan takes twice the time taken by Sohan to complete a piece of work

1.	Rohan takes twice the time taken by Sohan to complete a piece of work and half of the time taken by Mohan to complete the work. If all of them working together can complete the work in 12 days, in how many days Rohan and Sohan working together can complete that work?
A.	12 days
B.	14 days
C.	21 days
D.	25 days
E.	None of these.
Answer» C. 21 days

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Rohan takes twice the time taken by Sohan to complete a piece of work and half of the time taken by Mohan to complete the work. If all of them working together can complete the work in 12 days, in how many days Rohan and Sohan working together can complete that work?

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