This lesson uses the rt=d formula to solve a word problem involving a car and a bus traveling in the same direction. The car is twice as fast as the bus and after 2 hours, it is 68 miles ahead of the bus. The lesson breaks down the problem step-by-step using a chart and visual aids to explain the equation. The answer is revealed at the end of the lesson: the bus speed is 34 mph and the car speed is 68 mph.
Solves this word problem using rt=d formula: A car and a bus set out at 2 pm from the same spot, headed in the same direction. The average speed of the car is twice the average speed of the bus. After 2 hours, the car is 68 miles ahead of the bus. Find the rate of the bus and the car.
Answer: Bus speed: 34 mph; Car speed: 68 mph
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com