Rohit and Rohan can complete a work in 12 days and 6 days respectively. How much time will they take when working together?
4
3
5
2
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Sita and Sinu together can do a work in 50 days. With the help of Smitha, they completed the work in 6 days and earn Rs.250. What is the share of Sinu if Sita alone can do the work in 100 days?