a and b together take 5 days to do a work band c takes 7 days to do the same and a and c take 4 days to do it who among these will take the least time if put to do it alone
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this is ur answer
borahae
Step-by-step explanation:
A will take least time.
A& B =1Day=1/5day
B &C= 1 day= 1/7day
C&A= 1 day = 1/4day
2(A+B+C) =1day = 1/5+ 1/7+1/4=28+20+35/140=83/140
C= 83/140-1/5=55/140=140/55=230/140 Days
A=83/140-1/7=63/140=140/63=214/63Days
B=83/140-1/4=48/140=140/48=244/48 days
Thus, A takes least time.
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