Category: Mathematics | Last updated: 2026-09-18

A and B together can do a piece of work in 12 days. A alone can do it in 20 days. In how many days can B alone do it?

A) 25 days

B) 28 days

C) 30 days

D) 35 days

Explanation

1/12 - 1/20 = (5-3)/60 = 2/60 = 1/30. B alone = 30 days.

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