Question

Yash , Raj and Karan together can do a piece of work in 15 days , Raj alone can do it in 30 days and Karan alone can it in 40 days . In how many days will Yash alone can do the work ?
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Answer 1

Answer:

Yash , Raj and Karan together can do a piece of work in 15 days , Raj alone can do it in 30 days and Karan alone can it in 40 days . In how many days will Yash alone can do the work ?