Question

концерт симфонической музыки длится 1 час 40 минут.через полчаса после начала концерта дедушка уснул и проснулся за 15 минут до его окончания.сколько времени дедушка слушал концерт?

Answer 1

30 минут после начала и 15 минут до конца, итого: 30+15 = 45 мин. (слушал музыку) , а остальное время он проспал (1ч40мин -45 мин = 55мин.(проспал)

Ответ: 45 минут дедушка слушал концерт.

Answer 2

30+15=45 min slushal muziku

Answer 3

Calculating Grandfather's Listening Time at the Concert

To calculate the time the grandfather listened to the concert, we can follow these steps:

1. Total Duration of the Concert: The concert lasts for 1 hour and 40 minutes. 2. Time When Grandfather Fell Asleep: The grandfather fell asleep 30 minutes after the start of the concert. 3. Time When Grandfather Woke Up: The grandfather woke up 15 minutes before the end of the concert.

Let's calculate the time the grandfather listened to the concert.

Calculation

1. Total Duration of the Concert: 1 hour 40 minutes = 100 minutes. 2. Time When Grandfather Fell Asleep: 30 minutes after the start. 3. Time When Grandfather Woke Up: 15 minutes before the end.

To find out how long the grandfather listened to the concert, we can subtract the time he was asleep from the total duration of the concert.

Solution

1. Time Grandfather Fell Asleep: 30 minutes after the start. 2. Time Grandfather Woke Up: 15 minutes before the end. 3. Total Duration of the Concert: 1 hour 40 minutes = 100 minutes.

The time the grandfather listened to the concert can be calculated as follows: 100 minutes (total duration) - 30 minutes (time asleep) - 15 minutes (time awake before the end) = 55 minutes.

So, the grandfather listened to the concert for 55 minutes.

This calculation shows that the grandfather listened to the concert for 55 minutes.