Вопрос школьника по предмету Математика
В первую неделю карантина было съедено 60% привезенной из магазина еды, во вторую — 35% от остатка, а в третью — оставшиеся 78 кг. Сколько всего было привезено кг еды из магазина? СРОЧНО, ПОЖАЛУЙСТА
Ответ учителя по предмету Математика
Ответ:
300кг
Пошаговое объяснение:
на вторую неделю осталось 100%-60%=40% еды. От нее съели 35%, т.е. 40*35/100=14% (такое количество съели от первоначального объема еды за вторую неделю)
значит на третью неделю осталось = 100%-(60%+14%)=26% или 78 кг
Отсюда находим, сколько завезли еды = 78/26*100=300кг
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