Question

A can do a peice of work in 20 days.
B can do a peice of work in 30 days.
They work together for 3 days after which B leaves. In how many days will A finish the work

Answer 1

Answer:

b=30

a=20

A's work                                     = 20

no.of days they work together= 3

so = 20-3

    = 17

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