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A can do a piece of work in 5 days, B in 10 days. How long will they take to do it together?

A3 1/3 days

B15 days

C7 1/2 days

D2 days

Answer:

A. 3 1/3 days

Read Explanation:

[xy / x+y days] (10 x 5) / 15 = 10/3 days = 3 1/3 days


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