1.

1). 4 days2). 5 days3). 6 days4). 7 days

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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