Question

НА ПРИГОТОВЛЕНИЕ УРОКОВ БОРЯ ЗАТРАТИЛ В 3,5 РАЗА МЕНЬШЕ ВРЕМЕНИ ЧЕМ НА ПРОГУЛКУ СКОЛЬКО ВРЕМЕНИ УШЛО У БОРИ НА ПРОГУЛКУ И НА ПРИГОТОВЛЕНИЕ УРОКОВ ЕСЛИ ПРОГУЛКА ЗАНЯЛА 2,8 Ч? решите задачу пожалуйста обязательно с условием)

Answer 1

Вот ответ:
2,8:3,5=0,8(ч) - ушло на уроки
2,8+0,8=3,6(ч) - на всё

Answer 2

Х - на уроки
3, 5х - на прогулку
3,5х=2,8  х=2,8/3,5
х=0,8
0,8+2,8=3,6 на всё вместе

Answer 3

Problem Analysis

We are given that Borya spent 3.5 times less time preparing for lessons than going for a walk. We also know that the walk took 2.8 hours. We need to determine how much time Borya spent on both the walk and preparing for lessons.

Solution

Let's assume that Borya spent x hours preparing for lessons. According to the given information, Borya spent 3.5 times less time preparing for lessons than going for a walk. This means that the time spent on preparing for lessons is equal to 1/3.5 times the time spent on the walk.

We can set up the following equation to represent the relationship between the time spent on the walk and the time spent preparing for lessons:

x = (1/3.5) * 2.8

Now, we can solve for x to find the time Borya spent preparing for lessons.

Calculation

Let's calculate the time Borya spent preparing for lessons:

x = (1/3.5) * 2.8 x = 0.8 hours

Therefore, Borya spent 0.8 hours (or 48 minutes) preparing for lessons.

Answer

Borya spent 0.8 hours (or 48 minutes) preparing for lessons.