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A , B and C can do a piece of work in 1...

A , B and C can do a piece of work in 11 days, 20 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by B and C on alternate days?

A

7 days

B

8 days

C

9 days

D

10 days

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The correct Answer is:
B
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S CHAND IIT JEE FOUNDATION-TIME AND WORK -Question Bank - 13(a)
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