P, Q and R can do some work in 11 days, 20 days and 55 days respectively. In how many days can the work be done, if P gets the assistance of Q and R on alternate days?

P, Q and R can do some work in 11 days, 20 days and 55 days respective

1.	P, Q and R can do some work in 11 days, 20 days and 55 days respectively. In how many days can the work be done, if P gets the assistance of Q and R on alternate days?
A.	7
B.	9
C.	8
D.	10
Answer» D. 10

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P, Q and R can do some work in 11 days, 20 days and 55 days respectively. In how many days can the work be done, if P gets the assistance of Q and R on alternate days?

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