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1). 2.5 days2). 4 days3). 5 days4). 1.5 days |
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Answer» The part of work done by A in 1 DAY = 1/10 The part of work done by B in 1 day = 1/15 Let B work for X days after A left the work. According to the QUESTION, 5(1/10 + 1/15) + x/15 = 1 ⇒ 5(3 + 2)/30 + x/15 = 1 ⇒ 5/6 + x/15 = 1 ⇒ x/15 = 1 - 5/6 ⇒ x/15 = 1/6 ⇒ x = 15/6 = 5/2 ⇒ x = 2.5 days |
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