Question

rita rows 12 km upstream and 12 km downstream in 3 hours .The speed of rowing in still water is 9am per hour.find the speed of the stream?

Answer 1

let the speed of the boat be u

let the speed of the water be v

upstream = u-v

downstream = u+v

12 / (9+x) + 12 / (9-x) =3

solving the equation, we get x=3

The speed of the stream = 3 km/hr.