Предмет: Алгебра, автор: Kniginy

Из городо А в город В одновременно выехали 2 мотоциклиста, причем скорость первого была на 10км/ч больше скорости второго и первый мотоциклист прибыл в город В на 4 часа раньше другого мотоциклиста. Если бы они выехали из этих городов одновременно и навстречу друг другу, то встретились бы через 4 часа 48 минут. Найдите расстояние между городами.

Ответы

Автор ответа: merydog06
3
Расстояние S км, скорость первого x км/ч, второго (x-10) км/ч. Второй затратил на весь путь на 4 часа больше. При движении навстречу скорость сближения (x+x-10) = (2x-10) км/ч. 4 ч 48 мин = 4,8 часа.


Расстояние между городами 240 км

Kniginy: увы, я так же делала, но ответ должен быть 10км :с
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Русский язык, автор: paradais89ани
Вставь пропущеные буквы .Запиши слова .Понаблюдай ,изменится ли их смысл.Гора-кора,борт-...орт,бочка-...очка,жар-...ар,жили-...или,коза-ко...а,луг-лу... .Кто знает напишите плиз
1 год назад
Предмет: Английский язык, автор: Аноним
1) Carol and Bob (to be) late yesterday. 2) When he (to arrive), we already (to have) dinner. 3) While they (towatch) TV we (to take) our dog for a walk, 4) Next week we (to go to Disneyland. s) I never (to be) to India. 6) I am busy, I (to write) an essay now. 7) I just (to have) lunch. 8) Where is Susan? She (to sleep). 9) en we (to go) to the swimming pool we (to meet) Fred. 10) when he (to walk) down the street, he (to see)Jill.
1 год назад
Предмет: Русский язык, автор: 1357973
"мой имидж" сочинение 7 предложений
1 год назад
Предмет: Другие предметы, автор: snrara
Приведите примеры эпитетов из стихотворений русских поэтов​
7 лет назад
Предмет: Английский язык, автор: esonia4002
!!!Много баллов 55!!! !!!но сложное упражнение!!!
Read the text and fill in the gaps with the proper grammatical form of the capitalized words.
Type in the lower case words with one space between them if needed, use full forms of the verbs and numerals, without contractions.

lt's Saturday night, and Laura 1.(GO) to а party with some friends. 2.(LAURA) mother and father 3. (WATCH ТV) when she says goodbye to them. "l'm going to Sam's party. I 4.(NOT ВЕ) Iate," she says. ''You can't go out 5.(DRESS) like that!" yells Laura's dad. ''You 6.(LOOK) ridiculous." Laura looks down at her carefully 7.(CHOOSE) outfit. She's wearing а tight red top, а silver mini skirt and black boots with 15-centimetre heels. She 8.(COLOUR) her hair bright red and she is wearing 9.(TINT) glasses. Laura 10.(ТHINK) she looks great! Fashion 11.(ВЕ/ALWAYS) a matter of dispute. Young people express 12.(SELF) through fashion, and extreme fashion is a way 13.(REBEL).

In the 1960s young people started wearing mini skirts, bell-bottomed pants and flower patterns. Many young people 14.(ВЕСОМЕ) hippies, and рагents panicked when their teenage sons 15.(GROW) their hair long.

Then came the decade of glamorous fashion. Gold and silver pants and tiny tight tops 16.(ВЕСОМЕ) very popular in the 70s. Disco-goers 17.(WEAR) high-heeled shoes and boots that were almost impossible to walk in. Punk-rock also raised 18.(IT) ugly head during the 70s. Punks had crazy Mohawk haircuts and wоге dirty 19.(CLOTH) with holes in them. During the 90s, styles from the 60s and 70s came back. Midriffs were bare and body piercing came into fashion. Now that we 20.(ENTER) the 21.(TWENTY ONE) century (or the 'naughties'), you can wear whatever you like!

Overall, I think nowadays new fashions 22.(REPLACE) traditional ones, but I also think we should also try 23.(PRESERVE) typical traditional clothing. lt's part of our culture and heritage.
7 лет назад