Question

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 ?​

Answer 1

Answer:

in 35 day

bescause a do work in 30 day

and do work in 40 day

Answer 2

Answer:

a-b=30-40

=10days

this is right answer