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Offline Hermit
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Posts: 3,465
#1311
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Real own boy ran down a moving escalator and counted 40 steps. After that, he ran up the same escalator, but at half the speed relative to the escalator, and counted 280 steps. How many steps are in the visible part of the escalator?
Всё не так плохо как Вы думаете. Всё намного хуже!
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