Предмет: Математика, автор: Аноним

Автомобиль доехал из 1города до 2 за 3 часа впервый час он проехал 30%пути во второй час 55%который остался а в третий остальные 63 км.найдите растояние

Ответы

Автор ответа: таня90
0
30%=0,3
55%=0,55
х км - весь путь
х-0,3х=0,7х - остаток пути
0,7х*0,55=0,385х -  путь во второй час
0,3х+0,385х=0,685х - путь за два дня
х-0,685х=0,315х - составляют 63км
0,315х=63
х=63:0,315
х=200(км) - весь путь
Автор ответа: jekadva
0
x------весь путь
0,3x----проехал за первый час
0,7x*0,55=0,385x----проехал за второй час
x-0,3x-0,385x=63
0,315x=63
x=63:0,315
x=200км весь путь
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