Предмет: Математика, автор: Platonrubtsov30

1д-?км25%всего ,80%от 2д
2д-?км
3д-?км
Всего 48км

Ответы

Автор ответа: bel72777

0

Ответ:

12; 15; 21

Пошаговое объяснение:

Первая пропорция:

x₁ - 25%

48 - 100%

За 1-й день расстояние составляет:

x₁=(48·25)/100=48/4=12 км

Вторая пропорция:

x₂ - 100%

12 - 80%

За 2-й день расстояние составляет:

x₂=(12·100)/80=15 км

За 3-й день расстояние составляет:

48-(12+15)=48-27=21 км

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: Sverakreyder

Выписать из 18 главы "Мцыри" все предложения с деепричастиями.

1 год назад

Предмет: Русский язык, автор: novayai

Словообразовательный разбор слова загорать

1 год назад

Предмет: Английский язык, автор: flyrahas

1.Olivia write/wrote a funny story and it was very successful.
2. They find/found him and sent him home.
3. What were you do/doing at 6 pm yesterday?
4. When I (to go) to school yesterday, I suddenly (to remember) that I (to forget) to take my English exercise-book.
5. Yesterday grandfather (to tell) us how he (to work) at the factory during the war.
6. I already (to read) five English books.
7. He (to discuss) the problem with a lot of people before he (to take) a decision.
8. Mother (to bake) a delicious cake! Sit down at the table and let's eat it!
9. She (to read) an English book the whole evening yesterday.
10. I never (to be) to Greece.

1. Yesterday, Grant met/meet a man called Arthur.
2. I have already been deciding/have already decided what to wear.
3. It were/was raining all day when Tony took a day off work.
4. With the money I have, I will buy/to buy a laptop!
5. When she was coming/came, then she fed her cat.
6. Look! Jane (to swim) across the river.
7. What you (to do) at six o'clock yesterday?
8. You ever (to see) the Pyramids?
9. I (to go) to the Caucasus two years ago.
10. When Nick (to come) home yesterday, his mother (to return) and (to cook) dinner in the kitchen.

1. This soup tastes/is tasting delicious.
2. Paula is looking/looks for her car keys.
3. John has been reading/has read since early this morning.
4. I have just been buying/have just bought a new dress.
5. Tina was reading a book and his brother was listening/listened to music.
6. As George was driving to work his car broke/was breaking down.
7. We (to go) to school every day.
8. Nick (to do) his home-work by seven o'clock yesterday
9. You (to help) your father tomorrow?
10. We (to bring) a lot of berries from the wood

1 год назад

Предмет: Биология, автор: Kingmafiya707

Где расположен дугообразный клапон? помогите пожалуйста

7 лет назад

Предмет: Українська література, автор: CherniaevaViktiria

Прошу дуже допоможіть!
Мені потрібно позначити маршрут Павлуся (з повісті "За сестрою") Починаючи з села Спасівка.Бажано терміново. Заздалегідь дякую!

7 лет назад