Fewpal
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Speed of a boat in still water is 9 km ph and the speed of the stream is 1.5 km ph. A man rows to place at a distance of 105 km and comes back to the starting point. The total time taken by him is: 

a) 16 hrs 

b) 18 hrs 

c) 20 hrs 

d) 24 hrs

1 Answer

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Best answer

Correct option: d) 24 hrs

Explanation:

Speed upstream=7.5 km ph; speed downstream= 10.5 km ph total time taken= (105/7.5) +(105/10.5) hrs = 24 hrs 

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