Question

The time taken by a boat to go a certain distance against the cument is the same as to go the double distance along the current. The speed of the current is 3 km/h. How much time (in hours) will the boat take to travel
57.6 kom in still water? ​

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=42/4

x=10.5 km/h