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?

• 1
  \(3 {39 \over 64 }\)
• 2
  \(4 {39 \over 64 }\)
• 3
  \(5 {39 \over 64 }\)
• 4
  \(6 {39 \over 64 }\)