Question

A man can swim at the rate of 8 km/hr in still water. If the speed of the water is 3 km/hr, then the time taken by him to swim 15 km upstream is

A 4 hr Correct Answer Incorrect Answer
B 7 hr Correct Answer Incorrect Answer
C 3 hr Correct Answer Incorrect Answer
D 5 hr Correct Answer Incorrect Answer

Solution

Rate upstream = 8 – 3 = 5 km/hr Distance upstream = 15 km Hence, required time = distance/speed = 15/5 = 3 hours

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