Предмет: Математика, автор: НастяLove11111

Одна бригада рабочих может заасфальтировать 15 километров шоссейной дороги за 30 дней а другая за 60 дней За сколько дней могут заасфальтировать эту дорогу обе бригады работая вместе

Ответы

Автор ответа: EnoTIk31

производительность первой бригады 15:30=0.5 км/день
производительность второй бригады 15:60=0.25 км/день
Если бригады работают вместе, то их общая производительность 0.5+0.25=0.75 км/день
Тогда 15 км дороги вместе они закончат за 15:0.75= 20 дней.

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Fast food

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False
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