Question

A boat takes 9 hours to travel a distance upstream and takes 3 hours to travel the same distance downstream . If the spee of the boat in still water is 4 km/hr , what is the speed of the stream ?

Answer 1

Answer:

Let velocity of the stream be x km/h.

Therefore, Velocity of the boat downstream

= (4 + x) km/h

and velocity of the boat upstream

= (4 - x) km/h

According to the question,

3(4+x)=9(4−x)

=> 12+3x=36−9x

=> 12x = 24

Therefore, x =2 km/h

Answer 2

Answer:

hope it will help you