Digital SATMath: Problem-Solving and Data AnalysisMedium
A car travels at an average speed of 60 miles per hour. How many minutes will it take for the car to travel 45 miles?
- A45 minutes
- B30 minutes
- C40 minutes
- D50 minutes
Show answer & explanationAnswer & explanation
Correct answer: A. 45 minutes
First, calculate the time in hours: Time = Distance / Speed = 45 miles / 60 mph = 0.75 hours. Then, convert hours to minutes: 0.75 hours * 60 minutes/hour = 45 minutes.
Why the other options are wrong
- B. Incorrect. This would be the time for 30 miles at 60 mph.
- C. Incorrect. This would be the time for 40 miles at 60 mph.
- D. Incorrect. This would be the time for 50 miles at 60 mph.
Unit Conversion (Time)
Unit conversion is the process of changing a quantity from one unit of measurement to another using conversion factors, such as converting hours to minutes.
- 1 hour = 60 minutes
- 1 minute = 60 seconds
- Use conversion factors to cancel out unwanted units
Memory trick: Distance equals Speed Times Time, always.