Предмет: Математика, автор: eduardtroshin

электронасос выкачивает из кольца 30 л воды за 12с.а)За кокое время наполняется водой 800-литровая бочка

Ответы

Автор ответа: Nejetnoe1
1

30л-12сек

800л-хсек

800 х12/30=320сек

1000х12/30=400 сек

30л-12с

хл-10с

30х10/12=25л

30х18/12=45л

30лх120/12=300




eduardtroshin: но там у меня с дробями
eduardtroshin: но серовно спасибо
Автор ответа: Грет85
1
30л  -  12сек
800л  -  х сек
решаем пропорцию
х=800*12/30=320сек=5мин20сек - наполнится бочка
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