A can do 1 / 5 of a job in 10 days, B can do 1 / 3 rd of the job in 25 days. In how many days can they do half of the job working together?

A can do 1 / 5 of a job in 10 days, B can do 1 / 3 rd of the job in 25

1.	A can do 1 / 5 of a job in 10 days, B can do 1 / 3 rd of the job in 25 days. In how many days can they do half of the job working together?
A.	30
B.	45
C.	15
D.	20
Answer» D. 20

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A can do 1 / 5 of a job in 10 days, B can do 1 / 3 rd of the job in 25 days. In how many days can they do half of the job working together?

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