Problema Solution
A motorboat goes downstream in a river and covers the distance between two coastal towns in five hours.it covers this distance upstream in six hours.if the speed of the stream is 2km/h,find the speed of the boat in still water.
Answer provided by our tutors
Let speed of boat in still water = x km/h
Speed downstream = x+2
Speed upstream = x-2
Time up = 6 hrs
Time down = 5 hrs
Distance up = distance down
6(x-2) = 5(x+2)
6x-12 = 5x+10
x = 22 km/h