Из первого условия: 2S = 4v => S = 2v
Из второго: S = pt1, S = v/2 t2 (2v = v/2 t2 => t2 = 4 => t1 = 1).
Тогда: S = p*1 => 2v = p => v:p = 1/2.
Ответ: 1/2
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Из первого условия: 2S = 4v => S = 2v
Из второго: S = pt1, S = v/2 t2 (2v = v/2 t2 => t2 = 4 => t1 = 1).
Тогда: S = p*1 => 2v = p => v:p = 1/2.
Ответ: 1/2