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The speed of a boat when travelling downstream is 32 km/h, whereas when travelling upstream it is 28 km/h. What is the speed of the boat in still water?

Correct Answer:

Explanation:

Ans.  Suppose the speed of boat in still water is x km/h and speed of stream is y km/h


Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i) 


Speed of boat in upstream = (x – y) km/h


x – y = 28 …(ii)


Add. Eqs. (i) and (ii), we get 2x = 60


x = 30 km/h


 


 


 


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