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A and B together can complete a work in ...

A and B together can complete a work in 21 days. If A takes 42 days to complete the work alone, how many days will B take to complete the same work alone?
A और B मिलकर किसी कार्य को 21 दिनों में पूरा कर सकते हैं | यदि A कार्य पूरा अकेले करने में 42 दिन लेता है, तो B को उसी कार्य को अकेले पूरा करने में कितने दिन लगेंगे?

A

32

B

36

C

42

D

27

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