Asked by mawar

a motor boat can travel 45km downstream in 2 hour 30 minutes and 39km upstream in 3 hour 15 minutes. what is the speed of the boat in still water? what is the speed of the current?

Answers

Answered by Scott
b + c = 45 / 2.5 = 18 kph

b - c = 39 / 3.25 = 12 kph

adding equations (to eliminate c)
... 2 b = 30 kph

solve for b

substitute back to find c
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