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K is 4 times as fast as L and working together, they can complete a work in 24 days. In how many days can L alone complete the work ?

Correct Answer: 30 days

Explanation:

Given K=4L 


-->K+L = 4L+L = 5L


 


These 5L people can complete the work in 24 days, which means L alone can do the work in (24 x 5)=120 days.


 


Hence, K alone can do the work in 120/4= 30 days.


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