A, B and C can finish a work in 20, 30 and 60 days respectively working alone. If A and B started working together and after 5 days, B left the work and C joined to finish the remaining work with A. How many days did C work?

A, B and C can finish a work in 20, 30 and 60 days respectively working alone. If A and B started working together and after 5 days, B left the work and C joined to finish the remaining work with A. How many days did C work?

1). 8 days
2). 17/2 days
3). 35/4 days
4). 31/4 days

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