Ответ:
v средняя= s1+s2/ t1+t2
s=v*t
s1=60*t
s2=50*p
v средняя = 60*t+50*p/ t+p
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Ответ:
v средняя= s1+s2/ t1+t2
s=v*t
s1=60*t
s2=50*p
v средняя = 60*t+50*p/ t+p