Question

A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 42 hours. What is the speed of the boat in still water? What is the speed of the current?

Answer 1

16miles/hr

Explanation:

Speed = distance/time

Distance = 210miles

Time downstream = 10hrs

So, Speed = 210/10 = 21miles/hr

Going through current time is 42hrs

Speed = 210/42 = 5miles/hr

Speed of current = (21 - 5)miles/hr

= 16miles/hr