Joann took 20 minutes to drive her boat upstream to waterski at her favorite spot. Coming back later in the day, at the same boat speed, took her 15 minutes. If the current in that part of the river is 5 km per hour, what was her boat speed?

Joann took 20 minutes to drive her boat upstream to waterski at her favorite spot. Coming back later in the day, at the same boat speed, took her 15 minutes. If the current in that part of the river is 5 km per hour, what was her boat speed?

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter2: Solving Linear Equations And Inequalities

Section2.6: Solve A Formula For A Specific Variable

Problem 2.117TI: Lee wants to drive from Phoenix to his brother’s apartment in San Francisco, a distance of 770...

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Question

Joann took 20 minutes to drive her boat upstream to waterski at her favorite spot. Coming
back later in the day, at the same boat speed, took her 15 minutes. If the current in that
part of the river is 5 km per hour, what was her boat speed?

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