Что сможете please с подробным решением

21 ч 10 мин - 18 ч 30 мин = 20 ч 70 мин - 18 ч 30 мин = 2 ч 40 мин - время на 2 акта и антракт

1 ч 10 мин + 1 ч 15 мин = 2 ч 25 мин - два акта

2 ч 40 мин - 2 ч 25 мин = 15 мин - антракт

ответ: 15 мин.

1 ч 10 мин + 1 ч 15 мин = 2 ч 25 мин - два акта

18 ч 30 мин + 2 ч 25 мин = 20 ч 55 мин - был бы закончен спектакль без антракта

21 ч 10 мин - 20 ч 55 мин = 20 ч 70 мин - 20 ч 55 мин = 15 мин - антракт

ответ: 15 мин.

( 1 час = 60 мин; 21 ч 10 мин = 20 ч + 1 ч + 10 мин = 20 ч + 60 мин + 10 мин =20 ч 70 мин)

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