A boat goes 28 km downstream and while returning covered only 75 of distance covered in downstream i...........

Quantitative Aptitude (Insurance) Others

A boat goes 28 km downstream and while returning covered only 75% of distance covered in downstream, if boat takes 3 hr more to cover upstream than downstream. Find the speed of boat in still water (km/hr) if speed of current is ??/?? m/sec?

3 km/hr