Предмет: Математика, автор: Леонидус

помогите срочно! надо решить.

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Автор ответа: книжныйчервь

800:10=80(км/ч)
80-68=12(км/ч)
Ответ:на 12 км/ч поезд увеличил свою скорость.
нажми спасибо!

Автор ответа: Матов

тогда 1800-1000 = 800км ему осталось
800/10 = 80км/час его уже увеличенная скорость
80км/час-68км/час = 12км/час
Ответ 12км/час

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