A can complete a fiece of work in 12 days and &
can complete the same piece of work in Godoys. In
how many days can
A LB together complete the same
fiece of work?
A
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15 days
EXPLANATION :
B's 1 day's work = 1/12 - 1/20 = 2/60 = 1/30
(A + B)'s 1 day's work = 1/20 + 1/60 = 4/60 = 1/15
[B works for half day only]
So, A and B together will complete the work in 15 days.
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