Rate-Time-Distance A
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Lesson Description:
This video goes over a rate-time-distance word problem where only the distance is known. Solved using one variable, using the fact that t = d/r. Solved using a rational equation and quadratic equation.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you solve rate-time-distance problems?
- If Kira drove 200 miles from San Diego to Santa Barbara, and on the return trip, she decreased her speed by 10 mph, and the return trip took an extra hour, what was her speed on the way back?
- How can you make a chart to find the missing speed or rate in a rate-time distance problem?
- How can you use the equation d = rt to solve for rate in a word problem?
- How do you solve 200/x + 1 = 200/(x - 10)?
- How can you check your solution to a word problem involving rate, distance, and time?
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Staff Review
This is an excellent problem displaying a rate-distance-time word problem in which you must write two equations or make a chart to show the distance, rate, and time of the two trips and use these trips and the parts that the trips have in common to find the missing variable. All steps are shown and explained in this video.
