Предмет: Математика, автор: Аноним

помагите поооожаалуйста: Одну бочку воды муж выпивает за 14 дней,вместе с женой - за 10 дней. За сколько дней выпьет бочку воды его жена?

Ответы

Автор ответа: 25hjoerf10
0
1 : 14 = 1/14 - бочки воды муж выпивает за 1 день.
1 : 10 = 1/10 - бочки воды муж и жена выпивают вместе за 1 день.
1/10 - 1/14 = 7/70 - 5/70 = 2/70 = 1/35 - бочки выпивает жена за 1 день.
1 : 1/35 = 35 (дн.) - за столько дней выпьет одну бочку воды жена.
Ответ: 35 дней.
Автор ответа: Аноним
0
спасибо
Автор ответа: 25hjoerf10
0
пожалуйста
Автор ответа: неформальчик
0
за день муж выпивает 1/14 бочки
с женой за день 1/10 бочки
значит жена выпивает за день 1/10-1/14=14/140-10/140=4/140=1/35
тоисть бочку она выпьет за 35 дней
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