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A can do 1/5th of a job in 10 days, B ca...

A can do 1/5th of a job in 10 days, B can do 1/3rd of the job in 25 days. In how many days can they do half of the job working together?
A एक काम का 1/5 भाग 10 दिनों में कर सकता है, B उस काम का 1/3 भाग 25 दिनों में कर सकता है। एक साथ काम करते हुए वे कितने दिनों में उस काम का आधा हिस्सा कर सकते हैं?

A

30

B

45

C

15

D

20

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