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A and b can comolete a work alone in 18 days and 24 days respectively . if b started wirk alone and after 3 days a also joined then in how many days whole work will ne completed |
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Answer» PERSON A can complete the work in 18 days ⇒ 1 DAY = 1/18 of the work Person B can complete the work in 24 days ⇒ 1 day = 1/24 of the work Person B worked ALONE for 3 days ⇒ Work completed = 1/24 x 3 = 3/24 = 1/8 Work LEFT to do = 1 - 1/8 = 7/8 Person A and Person B worked together: 1 day = 1/18 + 1/24 = 7/72 Number of days needed = 7/8 ÷ 7/72 = 9 days Total number of days needed = 3 + 9 = 12 days. Answer: 12 days |
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