A, B and C can complete a work, working alone in 10, 15 and 20 days respectively. If all three work together, what fraction of the work is done by B?
Answer:
In one day the together will do [(1/10) +(1/15) + (1/20)]th work
= (6+4+3)/60 = 13/60
Fraction of total work done by B = (1/15) /(13/60) = 60/ (15 x 13)
= 4/13.
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Answer:
In one day the together will do [(1/10) +(1/15) + (1/20)]th work
= (6+4+3)/60 = 13/60
Fraction of total work done by B = (1/15) /(13/60) = 60/ (15 x 13)
= 4/13.
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