Question

A person can row a boat at the rate of 5 km in still water he take thrice as much time in goie 40 km upstream as in going 40 km downstream find the speed of stream

Answer 1

Let the speed of the stream be xkm/hr

Given that speed of the boat is 5km/hr

Therefore, speed of the boat in downstream= (5+x)km/hr

Speed of the boat in upstream= (5-x) km/hr

A/q

Time taken by boat in going 40km upstream is thrice the time taken by the  boat in the downstream   

 Thus,

          40/(5-x)= 3{40/(5+x)}

          40/(5-x)= 120/(5+x)

          200+40x= 600-120x

          120x+40x= 600-200

         160x = 400

          Therefore, x= 2.5km/hr

Hence, speed of the stream is 2.5km/hr.

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Answer 2

hi hope this helps you now bye hi and again bye