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A can finish a work in 20 days. A and B can together finish a work in 12 days.Then B alone can finish the work in

A24 days

B28 days

C25 days

D30 days

Answer:

D. 30 days

Read Explanation:

a -> 20 -> 3 a + b -> 12 - > 5 lcm(12 and 20 ) = 60 60/2 = 30 days


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