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27) A is 50% as efficient as B. C does half of the work done by A and B together ircadoes the work in 40 days, then A, B and C together can do the work in |
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Answer» C does half work of A & BWork done by C in a day is 1/40C = 1/(A+B) 21/40 = 1/(A+B) 22/40 = 1/A+B1/A+B = 1/20So A & B together take 20 days to complete a workNow A, B & C together take1/A + 1/B +1/C= 1/20 + 1/40= 3/40= 40/3 days= 13.33 days |
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