Question

2. A streamer goes downstream and covers the distance between two ports in
three hours while it covers the same distance upstream in 4 hours. If the speed of
the stream is 3km/hr, find the speed of the streamer in still water,​

Answer 1

Answer:

18km/hr

Step-by-step explanation:

Let the steamer speed will be x.

Downstream speed = (x+2)

Distance between the points = 4(x+2)    ---------- (1)

Upstream speed = (x-2)

Distance between the points = 5(x-2)     ------------ (2)

On solving (1) and (2), we get

4(x+2) = 5(x - 2)

4x + 8 = 5x - 10

x  = 18

speed of the steamer in still water = 18 km/hr