1.

Q: Ratan can complete a work in \(5 {1 \over 2}\) days while Rupesh can complete it in \(10 {1 \over 2}\) days. In how many days can they both complete it working on it together?

A. \(3 {39 \over 64 }\)
B. \(4 {39 \over 64 }\)
C. \(5 {39 \over 64 }\)
D. \(6 {39 \over 64 }\)
Answer» B. \(4 {39 \over 64 }\)


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