Question

Во время проведения книжной ярмарки были организованы встречи с писателями.Каждая встреча длилась 50 мин,а перерывы между ними - по 20 минут. Первая встреча началась в 11:00. В какое время закончилась четвёртая встреча?

Answer 1

11:00 — первая встреча
11:50 — конец первой встречи
12:10 — вторая встреча
13:00 — конец второй встречи
13:20 — третья встреча
14:10 — конец третьей встречи
14:30 — четвёртая встреча
15:20 — конец четвёртой четверти

Answer 2

Calculation of the End Time of the Fourth Meeting

To determine the end time of the fourth meeting, we need to consider the duration of each meeting and the breaks between them.

Given information: - Each meeting lasts for 50 minutes. - There is a 20-minute break between each meeting. - The first meeting starts at 11:00.

To calculate the end time of the fourth meeting, we can follow these steps:

1. Calculate the total duration of the meetings and breaks before the fourth meeting: - The first meeting starts at 11:00 and lasts for 50 minutes. - There is a 20-minute break after the first meeting. - The second meeting starts after the break and lasts for 50 minutes. - There is another 20-minute break after the second meeting. - The third meeting starts after the second break and lasts for 50 minutes. - There is a final 20-minute break after the third meeting.

2. Add up the durations of the meetings and breaks: - The total duration of the meetings is 50 minutes + 50 minutes + 50 minutes = 150 minutes. - The total duration of the breaks is 20 minutes + 20 minutes + 20 minutes = 60 minutes.

3. Calculate the total time elapsed from the start of the first meeting to the end of the third meeting: - The total time elapsed from the start of the first meeting to the end of the third meeting is the sum of the durations of the meetings and breaks: 150 minutes + 60 minutes = 210 minutes.

4. Calculate the start time of the fourth meeting: - The start time of the fourth meeting is the end time of the third meeting plus the duration of the break after the third meeting: 210 minutes + 20 minutes = 230 minutes.

5. Convert the start time of the fourth meeting from minutes to hours and minutes: - 230 minutes is equivalent to 3 hours and 50 minutes.

Therefore, the fourth meeting ended at 3:50 PM.