A takes thrice s long do a price of work, as B takes. A&B together can finish a price of work in 15 days. A long can do it in-

A takes thrice s long do a price of work, as B takes. A&B together can finish a price of work in 15 days. A long can do it in- Correct Answer 60 days

মনে করি, B কাজটি করে x দিনে.:. A কাজটি করে 3x দিনে প্রশ্নমতে, 15(13x + 1x) = 1⇒ 13x + 1x = 115⇒1 + 33x = 115⇒ 4x = 15.:. x = 20 .:. A কাজটি করে = (3 × 20) = 60 দিনে
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