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1). 4 days2). 5 days3). 6 days4). 7 days |
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Answer» ⇒ (A + B)’s 8 days’ work = 1 ⇒ (A + B)’s 1 DAY’s work = 1/8…….. (1) ⇒ (B + C) 12 day? work = 12 ⇒ (B + C)’s 1 day’s work = 1/12……. (2) ⇒ (C + A) 8 day?s work = 1 ⇒ (C + A)’s 1 day’s work = 1/8........ (3) ⇒ Now we add the equation (1), (2) and (3) we have ⇒ 2(A + B + C)’s 1 day’s work = 1/8 + 1/12 + 1/8 = 1/3 ⇒ (A + B + C)’s 1 day’s work = 1/6 ∴ the work will be completed in 6 days |
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