If Ramesh, Suresh and Harish can do a piece of work in 15 days, 10 day – McqOptions

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1.	If Ramesh, Suresh and Harish can do a piece of work in 15 days, 10 days and 6 days respectiVelY how long will they take to do it, if all the three work at it together ?
A.	3 days
B.	3 * (9/20) days
C.	3 and half days
D.	3 * (3/20) days
Answer» B. 3 * (9/20) days

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