ASVAB (Armed Services Vocational Aptitude Battery)Mathematics Knowledge (MK)Medium
A convoy of vehicles is traveling at a constant speed. If it covers 350 miles in 7 hours, and then continues for another 4 hours at the same speed, what is the total distance covered by the convoy?
- A550 miles
- B500 miles
- C600 miles
- D650 miles
Show answer & explanationAnswer & explanation
Correct answer: A. 550 miles
First, calculate the speed: Speed = Distance / Time = 350 miles / 7 hours = 50 mph. Then, calculate the distance for the second part of the trip: Distance = Speed * Time = 50 mph * 4 hours = 200 miles. Finally, add the distances: 350 miles + 200 miles = 550 miles.
Why the other options are wrong
- B. Error in calculating second distance or total sum.
- C. Possible error in speed calculation or second distance calculation.
- D. Significant calculation error.
Multi-Stage Distance Calculation
For multi-stage journeys, first determine the constant speed from initial data, then use that speed to calculate distance for subsequent stages, and finally sum all distances.
- Speed = Distance / Time
- Distance = Speed × Time
- Total distance is the sum of all individual distances.
Memory trick: Speed 'S'ets the 'S'tage for 'S'umming 'D'istances.