Предмет: Математика, автор: арчигудвин

нужно покрасить 84м ограды.один рабочий может выполнить эту работу за 6ч.а другой за 3ч.сколько времени понадобится этим рабочим если они будут красить ограду вместе

Ответы

Автор ответа: daneel201344

84:6 =14м/ч производительность первого
84:3=28 м/ч производительность второго
14+28=32 производительность двух вместе
84:32=2 часа
ответ :за 2 часа

Автор ответа: Аноним

я первый ответил

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