Предмет: Математика, автор: Alenaaa

Из "Арифметики" Л.Ф Магницкого. Лошадь съедает воз сена за месяц,коза-за два месяца,овца-за три месяца.За какое время лошадь ,коза и овца вместе съедят такой воз сена? ---------------------------------------------------------------------------- Трое выиграли некоторую сумму денег.На долю первого пришлось 1/4 этой суммы,на долю второго 1/7(дроби) ,а на долю третьего 17 флоринов. Как велик весь выигрыш? ___________________________________________________ Некто взял из сокровищниц 1/13.Из того что осталось, другой взял 1/17.Оставил же в сокровищнице 192.Мы хотим узнать,сколько было в скоровищнице первоночально.

Ответы

Автор ответа: Fedor
0

Так как лошадь съедает воз сена за месяц, то за год  она съест 12 возов сена.

Так как коза съедает воз сена за 2 месяца, то за год она съест 6 возов сена.

Так как овца съедает  воз сена за 3 месяца, то за год она съест 4 воза сена.

Вместе  за год они съе­дят 12+6 + 4 = 22 воза сена. Откуда  один воз сена они все вместе съедят за 12/22 =6/11  месяца.

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