On a spring break drive, the car goes 55 miles/hr. The beach is 110 miles from their house. They do not stop, and the speed stays steady. The family uses the rate to plan snacks. If a car travels at 55 miles per hour, how long will it take to travel 110 miles?
- 3 hours
- 2 hours (correct answer)
- 1 hour
- 165 hours
Explanation: This question tests the ability to use a rate to solve unit conversion or comparison problems on the ISEE Lower Level. Understanding rates involves applying a constant to convert or compare quantities in different units. For example, converting miles to hours using a speed rate. In this scenario, students are given a specific rate and must apply it to a provided context, such as calculating the time to travel a given distance. Choice B is correct because it correctly applies the rate of 55 miles per hour to find 2 hours, demonstrating an understanding of unit conversion. Choice D is incorrect because it results from a common error, such as multiplying the distance by the rate incorrectly. To help students, teach them to identify the units involved and ensure they understand the rate's role. Encourage practice with real-world scenarios to strengthen their understanding of rates and unit conversions.