Question

3. A motorboat goes downstream and covers the distance between two ports in 5 hours and
returns back in 7 hours. If the water is flowing at 2 km/h, find the speed of the boat in
still water.​

Answer 1

Hi mate here is the answer:--

Let the motorboat speed will be x

Downstream speed = (x + 1)

Distance between the points = 5(x+2)⋯(i)

Upstream speed = (x-1)

Distance between the points = 7(x-2)⋯(ii)

on solving (i) and (ii)

5(x + 2) = 7(x-2)

5x + 5 = 7x-14

5x-7x = -14-5

-2x = -19

x = 9.5

∴The speed will be 9.5 km/hr

Hope it helps you ❣️☑️