The speed of a boat itself is 30 km/h and the rate of flow of the stream is 5 km/h. Moving against the stream the boat went 200 m. What distance will the boat cover during the same time going in the direction of the stream?
Let the distance to be covered by the boat when it is travelling in direction of the stream be x.
Downstream speed = 30 + 5 = 35 km/h
Upstream speed = 30 – 5 = 25 km/h.
Since the time taken is same x/35 = 200/25
⇒ x = 280 m.