adapted from Inside Mathmatics (https://www.insidemathematics.org/) challenge questions for CCSS mastery
5 points
5
Question 1
1.
Courtney got a remote control car for her birthday. It is metallic purple with chrome wheels that are 1 1/2 inches in diameter.
She said to her friend, Dylan, “My remote control car goes faster than my mom’s car on the freeway.” “No way,” said Dylan. Courtney said, “I will prove it to you.”
Courtney measured off a distance of 115 inches. Dylan said, “Okay, I will time how long it takes your car to travel that distance. I have a stop watch feature on my watch.” Courtney raced her remote control car over the 115-inch distance.
Dylan said, “Wow, that only took 3.21 seconds. That seems really fast.” “See, I told you,” said Courtney. “But really how fast is it going?” answered Dylan.
Determine the speed of Courtney’s remote control car and compare its speed to that of a regular car traveling on the freeway. Explain how you found your solution.