A and B can do a piece of work in 10 h B and C can do it in 15 h while A and C take 12 h to complete...........

Quantitative Aptitude (CDS) Time and work

A and B can do a piece of work in 10 h. B and C can do it in 15 h, while A and C take 12 h to complete the work. B independently can complete the work in

12h

16h

20h

24h

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Explanation:

A's and B's 1 h work =1/10
B's and C's 1 h work =1/15
A's and B's 1 h work =1/12
A s B s and C’s 1h work =1/2( 1/10+1/15+1/12)
=1/8
B's work in 1 h =1/8−1/12=1/24
B can complete the work in 24 h