Rate of current problem 1

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
7957 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, we learn how to solve a word problem involving the rate of a current and rowing in still water using two variables and two linear equations. We are given the distance and time traveled by a dolphin both with and against the current and are tasked with finding the rate of the dolphin in still water and the rate of the current. By setting up a chart and using the formula rate times time equals distance, we can write two equations and solve for both variables, with the final answer being the rate of the dolphin in still water is 35 miles per hour and the rate of the current is 5 miles per hour.

Lesson Description:

Shows how to solve a word problem involving the rate of a current and rowing in still water using 2 variables and 2 linear equations.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
  • How do you solve a word problem using systems of equations?
  • How do you set up a system of equations from a word problem?
  • How do you check your answer to a system of equations word problem?
  • How do you solve a word problem about swimming with an against a current?
  • Is there an easy way to find the rate of a water current?
  • If a dolphin swimming against an ocean current traveled 60 miles in 2 hours and traveled back home in 1.5 hours, what is the speed of the dolphin in still water and what is the rate of the current?
  • How do you solve the system of equations 2(d - c) = 60 and 1.5(d + c) = 60?
  • Staff Review

    • Currently 4.0/5 Stars.
    This problem is very similar to the rate of a plane in the wind problem. All steps of this problem are explained. You will learn how to think about rate of current problems, how to make a table and set up equations, how to solve systems of equations, and how to check your solution in the original problem. Another great lesson.