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Solve problem. See EXAMPLE.Boat Speed Joann took 20 min to drive her boat upstream to wate...

Solve problem. See EXAMPLE.

Boat Speed Joann took 20 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 15 min. If the current in that part of the river is 5 km per hr, what was her boat speed?

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Solutions For Problems in Chapter 1.2

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