Problema Solution
The speed of a motor boat in still water is 60 kph. It goes 100 kilometers up the river and then comes the 10 kilometers back in a total of 12 hours. What is the speed of the current of the river?
Answer provided by our tutors
the speed of the current of the river:x
So the equation is
100/(60-x) + 10/(60+x) = 12
So
x = 51.60
So
the speed of the current of the river is 51.60 km/h