Предмет: Математика, автор: Аноним

Самолёт пролетает расснояние 2700 км за 3 часа, а поезд едет расстояние в 6 раз меньше на 2 часа дольше. Во сколько раз скорость самолёта больше скорость поезда?

Ответы

Автор ответа: ptanyavamp

1) 2700:6=450(км)-едет поезд
2)2700:3=900(км/ч)-скорость самолёта
3) 450:(3+2)=90(км/ч)-скорость поезда
4) 900:9=100(раз)
Ответ: В 100 раз скорость самолёта больше скорости поезда

Автор ответа: Timon48

Самолет: S(2700км);v(?);t(3 ч) v=S÷t. v=2700км÷3ч=900 км/ч (скорость самолета)
Поезд: S(2700÷6=450км);v(?);T(3ч+2ч=5ч). v=450км÷5ч=90 км/ч (скорость поезда)
Скорость самолета делим на скорость поезда: 900÷90=10
Ответ: Скорость самолета в 10 раз больше скорости поезда

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: restl

Сочинение на тему мой голос помогите пж

1 год назад

Предмет: Русский язык, автор: Ирина12345098765

( ),а ворона уже свила гнездо.
( ), но птицы ещё не улетели в тёплые края.
Вместо скобок нужно придумать начало
Помогите пожалуйста

1 год назад

Предмет: Английский язык, автор: trytohelpme

1. For information ___________, it must be attached to a radio – frequency carrier wave.
a. to be transmitted
b. will be transmitted
c. transmitted

2. Various installations ___________ to transform electric power into mechanical and heat power.
a. have been used
b. are using
c. are being used

3. The experiment ___________ to be continued .
a. reports
b. is reporting
c. is reported

4. A computer ___________ to possess four main parts.
a. has been known
b. is known
c. knows

5. The atmosphere ___________ to extend several hundred kilometers above the Earth.
a. proves
b. has been proved
c. is proved

6. Transistor batteries ___________ to be great use in systems that have to operate on weak signals, for example, in ultra-long-distance space communications.
a. expected
b. have been expected
c. were expected

7. Materials ___________ very high resistance are called insulators.
a. having
b. have
c. are having

8. A cable conduit is an arrangement ___________ in the ground.
a. building
b. is built
c. built

9. ___________ calculations, a computer displays results.
a. Having performed
b. Performed
c. Performing

10. A faulty cable ___________ between two manholes is to be replaced.
a. having run
b. running
c. runs

11. ___________ under different conditions, the devices were put to use.
a. having been tested
b. testing
c. tested

12. The device ___________ faulty, one cannot rely on its readings.
a. is
b. being
c. to be

13. RAM stands for Random Access Memory, information ___________ into and out of any single byte of memory.
a. being transferred
b. transferred
c. have transferred

14. Other factors ___________ constant, the current is known to be directly proportional to conductivity.
a. be
b. being
c. having been

18. A barometer is used for _______________ the atmospheric pressure.
a) measuring
b) measures
c) measurement

19. Is any metal capable of _______________ into a wire.
a) drawing
b) being drawn
c) having drawn

20. We know the atmospheric pressure __________ as attitude increases.
a) decreases
b) is decreasing
c) to decrease

21. Quantum electronics _________________, it became possible to produce clock that measure time with an accuracy of one second per 300 years.
a) having been developed
b) have been developed
c) being developed

22. Without the Sun there _____________ no light, no heat, no energy of any kind.
a) will be
b) would be
c) will

1 год назад

Предмет: Алгебра, автор: toliayultemiroff

Решите уравнение x-2y=3 3x+2y=1 через систему уравнение

7 лет назад

Предмет: Математика, автор: Frizziii

Ребят помогите с 4-ым

7 лет назад