Answer:
Explanation:
Jane took 30 min to drive her boat upstream to water-ski at her favorite spot. Coming back later in the day, at
the same boat speed, took her 10 min. If the current in that part of the river is 6 km per hr, what was her boat
speed in still water?
Let b+6 be downstream rate.
and b-6 be upstream rate.
Distance up = Distance down = (rate)(time)
(b+6)(1/6 hr) = (b-6)(1/2 hr)