Предмет: Математика, автор: vaninalitru2

двое очистили 400 штук картошки. один очишал 3 штуки в минуту, другой 2 штуки в минуту. второй работал на 25 минут больше первого.
сколько времени работал каждый?

Ответы

Автор ответа: rudkovskaya76

1

25*2=50 карт. почистил второй за 25 минут
400-50=350 карт. чистили двоем за одно время
3+2=5 карт за минуту чистили двоем
350÷5=70 минут работал первый или 1ч 10мин
70+25=95 минут работал второй или 1ч 35 минут

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