Distance Problem 4 - Uniform Motion rt=d
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Part of video series
Lesson Description:
Solves this word problem using rt=d formula: Andy and Beth are at opposite ends of a 18-mile country road with plans to leave at the same time running toward each other to meet. Andy runs 7 mph while Beth runs 5 mph. How long after they begin will they meet?
Answer: 1.5 hours
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you solve uniform motion problems?
- How do you solve equations using the formula rate * time = distance?
- How can you draw and use pictures to solve word problems using the formula d = rt?
- How can you come up with an equation to solve a uniform motion problem?
- How can you use a chart to solve a uniform motion problem?
- How can you check your solutions to a uniform motion problem?
- If two people are at opposite ends of an 18-mile road, they leave at the same time running toward each other, and one person runs 7 mph and the other runs 5 mph, how long after they begin will they meet?
- If you know the rates that two people are running, how do you write an expression for the time and distance they ran?
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Staff Review
This uniform motion problem is solved the same way as the rest -- making a sketch of the situation, creating a chart that leads to solving an equation. This problem goes much more quickly and easily than the rest of the problems, however.
