ASVAB (Armed Services Vocational Aptitude Battery)Arithmetic Reasoning (AR)Medium
A reconnaissance drone completes 3/5 of its mission flight path in 45 minutes. At this rate, how much total time, in hours and minutes, will the entire mission take?
- A1 hour 45 minutes
- B1 hour 30 minutes
- C1 hour 25 minutes
- D1 hour 15 minutes
Show answer & explanationAnswer & explanation
Correct answer: D. 1 hour 15 minutes
If 3/5 of the mission takes 45 minutes, find the time for 1/5 of the mission. Then multiply that by 5 to find the total time for the entire mission. Convert the total minutes into hours and minutes.
Why the other options are wrong
- A. This option is incorrect; it might result from dividing 45 by 3 and then multiplying by 7, or other calculation errors.
- B. This option is incorrect; it might result from a miscalculation, perhaps assuming 3/5 of 90 minutes.
- C. This option is incorrect; it might result from incorrect calculation of the total time or conversion.
Fractional Time Calculation
Fractional time calculation involves determining the total time required for a task when a known fraction of the task has been completed in a given amount of time.
- Uses the concept of direct proportion.
- If a fraction 'part/whole' takes 'X' time, then '1/whole' takes 'X/part' time.
- Total time is (X/part) * whole.
Memory trick: If you know how long a piece of the pie takes, you can find the whole pie's time.