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A person can swim in water with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, what will be the time taken by the person to go 68 km downstream?

A2.5 hours

B3 hours

C4 hours

D3.5 hours

Answer:

C. 4 hours

Read Explanation:

Downstream Speed = (13+4) km/hr = 17 km/hr To travel 68 km downstream. Time taken = 68/17 = 4 hours


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