Question

Anil is twice as good a student as Bharat and is able to finish a work in 30 minutes less than Bharat’s time. Find the time in which both of them can finish the same work together?

Accepted Answer

D. Efficiency ratio Anil : Bharat = 2 : 1 $\implies$ Time ratio = 1 : 2. Let Anil take $t$ minutes and Bharat take $2t$ minutes. $2t - t = 30 \implies t = 30$ min (Anil) and $2t = 60$ min (Bharat). Combined time = $\frac{30 	imes 60}{30 + 60} = \frac{1800}{90} = 20$ minutes.

Work efficiency time comparison

Explanation

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