Question

Aaru Swati and Rajni can finish a work in 4 days if they

Q: Aaru Swati and Rajni can finish a work in 4 days if they work together. However, Aaru alone will tak

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work together. However, Aaru alone will take 9 days to complete the work, and Swati alone will complete the work in 12 days. How many days will Rajni take alone to complete the work?

A 25days

B 20days

C 42days

D 16days