В первый день велосипедисты проехали 4/15 части пути.во второй день его 2/5 части,а за третий день оставшиеся 90 км.Каков проделанный путь за 3 дня?
Предмет:
МатематикаАвтор:
finn461-4/15-2/5=1/3=90 км (по условию )
90*3=270 км весь путь
Автор:
katie4/15 +2/15 = 4/15+6/15=10/15=2/3 - проделанный путь за 2 дня
1-2/3=1/3 - проделанный путь за 3-й день
Значит 90 км это и есть 1/3 всего пути
90=1/3х
х=90:1/3
х=270
Ответ: 270 км
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