High School

The morning session in a school began at 09:25. There were three lessons of 50 minutes each and one break of 20 minutes. At what time did the morning session end? Give your answer using the 24-hour clock.

A. 12:35
B. 13:05
C. 13:15
D. 13:25

Answer :

Final answer:

The morning session ends at 12:15 PM (24-hour clock: 12:15) when adding the three 50-minute lessons and the 20-minute break to the start time of 09:25 AM.

Explanation:

The school session starts at 09:25 AM and consists of three lessons, each lasting 50 minutes and a single break of 20 minutes. To calculate the end time, we add the total duration of the lessons and the break to the start time.

  1. Add the duration of the three lessons: 3 × 50 minutes = 150 minutes.
  2. Add the duration of the break: 150 minutes + 20 minutes = 170 minutes.
  3. Convert the total duration from minutes to hours and minutes: 170 minutes = 2 hours and 50 minutes.
  4. Add this duration to the start time: 09:25 AM + 2 hours and 50 minutes = 12:15 PM.

Therefore, using the 24-hour clock, the morning session ends at 12:15, which is not listed among the provided options. It seems there might be an error in the question or the options given.

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