Question

Steamer going downstream in a River covers distance between the two towns in 20hours coming back upstream it covers this distance in 25 hours speed of the water is 4 km per hour find the distance between the two Towns

Answer 1

Let the speed of steamer in still water=x
speed of water =4km/hr
speed of steamer in downstream=(x-4)km/hr
Distance covered in 1 hr=(x-4)km
Distance covered in 20 hr=20(x-4)km
Speed of steamer in upstream=(x+4)mm/hr
Distance covered in 1hr=(x+4)km20
Distance covered in 25 hr=25(x+4)km
A/Q,
20(x-4)=25(x+4)
20x-80=25x+100
20x -25x=100+80
5x =180
x=180/5
x=36km/hr