CAT Quantitative Ability Questions | CAT TIme, Speed, Distance and Work questions

CAT/2001

Question . 100

At his usual rowing rate, Rahul can travel 12 miles downstream in a certain river in six hours less than it takes him to travel the same distance upstream. But if he could double his usual rowing rate for this 24 mile round trip, the downstream 12 miles would then take only one hour less than the upstream 12 miles. What is the speed of the current in miles per hour?

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Explanatory Answer

Method of solving this CAT Quantitative Ability Question from TIme, Speed, Distance and Work question

(d) Time taken in downstream = Time taken in upstream – 6 hr.

Let his speed be x in normal water and speed of current be y