Question

the water in a river flows at a speed of 1.5 km per hour and a boatman who can row is boat at a speed of 2.5 kilometre per hour in still water takes 7.2 hours to go how distance options and then return to the starting point the total distance covered by the boatman is​

Answer 1

Answer:

Let distance be x km

Speed downstream = 5+2 = 7 km /hr.

Speed upstream = 5-2 = 3 km/hr.

So 3x−7x=2

7x−3x=2×21

4x = 42

x=442=10.5 km/h