A can do 1/4 of a work in 5 days , while B xan do 1/5 of the work in 6 days . In how many days can both do it together ?
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A can do 1/4 of a work in = 5 days
A can do 1 work in in = 5×4 = 20 days
B can do 1/5 work in = 6 Days
B can do 1 work in = 5×6 = 30 days
A 1 day work = 1/20
B 1 day work = 1/30
(A+B)' s 1 day work 1/20+1/30
= 3+2/60 = 5/60 = 1/12
A and B working togather will complete the work in = 12 days
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