Question
Sudhir is 4.5 times as efficient as Aarav. If they work
together, they can complete a piece of work in 9 days. How many days will Aarav take to do the same work alone?Solution
Efficiency of Sudheer and Aarav=4.5 and 1. Sudheer        Aarav 4.5                 1 They work together with total efficiency – 4.5+1=9days. Total work =9×5.5=49.5unit. Aarav takes time the complete work =49.5/1=49.5days.
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