Предмет: Математика, автор: minecrafter500

Один поезд проезжает весь путь за 30 ч.
Два поезда выехали на встречу друг другу и встретились через 12 часов
За сколько часов второй поезд пройдёт путь

Ответы

Автор ответа: fadarm
0
Так как первый поезд проходит весь путь за 30 часов, то за 12 часов  (если весь путь представить в виде 1) он пройдет 0,4 пути,  и так как они встретились через 12 часов, значит второй поезд прошел 1-0,4=0,6 пути.
Если 0,6 пути - это 12 часов движения второго поезда, то весь путь он пройдет за frac{12*1}{0,6}= 20 часов

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: takimbek1

SPECIFICATION OF SUMMATIVE ASSESSMENT FOR TERM 4
Review of Summative Assessment for term 4
GRADE 5
Duration of the summative assessment for term – 40 minutes
Reading – 20 minutes
Writing – 20 minutes
Total marks – 11
The structure of the summative assessment for term
This sample of Summative Assessment consists of questions: reading, writing tasks. Different types of tasks are used in the summative assessment for term.
Reading – answer the 5 questions after reading the text «Holidays».
Writing – write a paragraph about last holiday celebration by answering the following questions.



Unit Strand Learning objective *Total number of questions *Question № *Type of question *Task description Time Total marks
Holidays Reading 5.R1 Understand the main points in a limited range of short
simple texts on general and curricular topics
Students read the text “Holidays”. Then they answer the 5 questions below. They use the information from the story. 20 minutes 5
Writing
5.W3 Write with support factual descriptions at text level
which describe people, places and objects
Students write a paragraph about their last holiday celebration by answering the following questions.
20 minutes 5
Total 40 minutes 10


READING
Task 1. Use the information in the story to answer the questions below.
Holidays
Henry liked Spring Holidays, because he liked the weather and St. Patrick’s Day. In that day people wear green. Easter was a good holiday, too. You could see the Easter Rabbit, hunt for eggs and find candy.
Sandra liked Summer Holidays, like Independence Day. She always went to the air show to see airplanes. In the evening they’d shoot off fireworks. Mother’s Day and Father’s Day were usually in the summer, too.
Judith loved Fall holidays most. Sweetest Day wasn’t that popular, but it was a nice day and sometimes she got candy. Halloween was such a great time. Thanksgiving was just a few weeks later. Between Halloween’s candy and Thanksgiving’s turkey was the best food season of the year.
Winter holidays were Thomas’ favourites. Christmas was a great time to be with family. New Year was exciting, because everyone stayed up late and cheered when the year changed, and there were often fireworks.

1. What season holidays does Henry like most?

A. Spring
B. Summer
C. Autumn
D. Winter
2. Fall is the favourite season for ______
A. Henry

B. Sandra
C. Thomas
D. Judith
3. Which of these is NOT a summer holiday?
A. Father’s Day

B. St. Patrick’s Day
C. Mother’s Day
D. Independence Day
4. Which of these is a spring holiday?
A. Easter
B. Christmas
C. Thanksgiving
D. Independence Day
5. Which of these is a fall holiday?
A. Christmas

B. Easter
C. Independence Day
D. Halloween
Which season’s holidays were Thomas’s favourite holidays?
A.Winter
B. Summer
C. Spring
D.Autumn



WRITING
Task 2. Write a paragraph about your last holiday celebration answering the following questions.

1) What was your last holiday?
2) Where did you celebrate it?
3) How many people were at the party? Who were they (friends, relatives, classmates)?
4) Did anyone get presents? What kind of presents?
5) What did you like the most?
_______________________________________________________________________
_______________________________________________________________________
_______________________________________________________________________
A learner should
- Give full answers
- Answer for 5 questions
- Write at least 30 words
6 лет назад
Предмет: Геометрия, автор: abikosha17092007
помогите пожалуйста
...................​
6 лет назад
Предмет: Геометрия, автор: hangergames6
Точки А( -4;-4), B( -4; 2), C(4;2), D(8;-4) - являются вершинами
прямоугольной трапеции с основаниями AD и BC.
а) Найдите длину средней линии MN
б) Площадь прямоугольной трапеции.
6 лет назад
Предмет: Алгебра, автор: ibelimgotov
Решите неравенство
0,8+4,5>5-1,2х
10 лет назад
Предмет: Экономика, автор: zuykova98
каким образом закон стоимости способствует увеличению эффективности производства товаров.
10 лет назад