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Question

Difficulty: EasyTime Measurements and Calculations

A motor pool mechanic is reviewing the scheduled time required for four different vehicle maintenance tasks. Arrange the given task durations from the shortest amount of time to the longest amount of time.

  1. 111 hour and 1515 minutes
  2. 28585 minutes
  3. 31.51.5 hours
  4. 4100100 minutes

Answer

The correct sequence from shortest to longest is: 11 hour and 1515 minutes (7575 minutes), 8585 minutes, 1.51.5 hours (9090 minutes), and finally 100100 minutes.
By converting all the task durations into minutes, we get 7575 minutes, 8585 minutes, 9090 minutes, and 100100 minutes. Ordering these values mathematically from smallest to largest yields the correct chronological sequence.

Step-by-Step Solution

1
Convert all the given time durations into a single common unit, such as minutes.
11 hour and 1515 minutes = 7575 minutes; 8585 minutes = 8585 minutes; 1.51.5 hours = 9090 minutes; 100100 minutes = 100100 minutes.
Comparing measurements is much easier and more accurate when every value is expressed in the exact same unit.
2
Order the newly converted values mathematically from the smallest number to the largest number.
75<85<90<10075 < 85 < 90 < 100
The question specifically asks for the durations to be arranged from the shortest amount of time to the longest.
3
Match the ordered numerical values back to their original given text formats.
11 hour and 1515 minutes, then 8585 minutes, then 1.51.5 hours, then 100100 minutes.
This establishes the final correct arrangement of the provided items.

Key Concept

Converting mixed time units (hours and minutes) and decimal hours into a single unit (minutes) to accurately compare and order durations.
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Topics

Time Measurements and Calculations

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