Discussion :: Time and Work
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A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
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Answer : Option C
Explanation :
A's 1 hour's work =14;
(B + C)'s 1 hour's work =13;
(A + C)'s 1 hour's work =12;
(A + B + C)'s 1 hour's work =[14+13]=712
B's 1 hour's work =[712-12]=12
B alone will take 12 hours to do the work.
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