Жена космонавта ожидает, что в гости на день космонавтики придут трое или пятеро гостей.как ей разрезать пирог весом 600 г на 7 чатей, чтобы его можно было раздать гостям поровну в любом случае?

1. 90 км : 45 км/ч = 2 часа -  ехал.

 

2. 2 ч + 25мин + 35 мин =  3 часа - всего в пути.

 

3. 13.ч 20 мин - 3 ч = 10ч 20 мин  - выехал из Москвы

 1. 36 : 2 = 18 км/ч  - первичная скорость

 2.  ( 18 - 2)  х 3 = 48 км  - проехал после снижения скорости

 3. 36 + 48 = 84 км -  всего проехал

1. ( 3 х15) + ( 2 х 37) + ( 6 х 8 )  = 167 р. -  потратила

2. 200 - 167 =  33 рубля -   на шоколадку хватит

Объём : 5 х 6 х 3 = 90 м.куб,  S пола и потолка : 5 х 6 = 30 м.кв,   S стен : (5 х 3 ) х 2 = 30м.кв

( 6х 3) х2 = 18 м.кв         30 + 18 = 48 -   общая  S всех стен

Leo tolstoy was born on 9 sentyabrya year. "young loew has been in musclemania four years. in july 1837 suddenly his father died. (mother tolstoy died when he was two years old.) orphaned children moved to kazan, where she was their guardian, aunt p. i. yushkova. tolstoy lived in kazan six years. that was the time of his adolescence and youth. two and a half years he was preparing to enter the university. deciding to become a diplomat, tolstoy sat exams on the east branch. he successfully passed the exams on the history, geography, mathematics, statistics, russian literature, logic, english, french, german, latin, arabic, turkish and tatar languages. already in the time of leo tolstoy showed exceptional ability to learn foreign languages. later, the sister of the writer was talking about. professor hired as a senior teacher with whom tolstoy studied turkish and tatar languages, found his ability to master languages extraordinary."