Ответ:
48 км/ч
Объяснение:
Vcp = S/t = (s1+s2) / (t1+t2) = (s1+s2) / (s1/v1+s2/v2) =
= (120+120) / (120/40+120/60) = 2 / (1/40+1/60) = 2 (60*40) / (40+60) =
= 2 *2400 / 100 = 48 км/ч
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Ответ:
48 км/ч
Объяснение:
Vcp = S/t = (s1+s2) / (t1+t2) = (s1+s2) / (s1/v1+s2/v2) =
= (120+120) / (120/40+120/60) = 2 / (1/40+1/60) = 2 (60*40) / (40+60) =
= 2 *2400 / 100 = 48 км/ч