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Mathematics, 23.02.2021 19:40 megan3226

водяной бак наполняется двумя трубами за 2 часа. Первая трубаможет наполнить его на 3 часа скорее чем вторая. За сколько времени первая труба может наполнить бак​

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водяной бак наполняется двумя трубами за 2 часа. Первая трубаможет наполнить его на 3 часа скорее че...
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