59. ‘A’ can do a piece of work in 30 days while ‘B’ can do it in 40 days . A and B working together can do it in ?
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Answered by
0
Answer:
in 35 day
bescause a do work in 30 day
and do work in 40 day
Answered by
0
Answer:
a-b=30-40
=10days
this is right answer
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