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The ratio of efficiencies of A, B and C is 2:5:3. Working together, they can complete the work in 27 days. B and C together can complete 4/9th part of that work in? |
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Answer» 15 days Step-by-step explanation: efficiency ratio of A, B & C => 2 : 5 : 3 so there efficiency when working together = 2+5+3 = 10 & time taken by them to complete a work working together = 27 days now work = Time × efficiency => work = 27 × 10 = 270 so, B & C can do 4/9th part of the work in => 270 × 4/9 = 30×4 = 120 work to be DONE = 120 & efficiency of B & C = 5 & 3 => Total efficiency = 5+3 = 8 Time = work/efficiency = 120/8 => Time = 15 days (answer) |
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