найдите решения этих задач пж срочно помогите
1) дано:
Sn=800 m
Sm=100 m.
t=1 min.

2) V=85 km/h
t=2 h
S2=16420 km.
S1=?

3)дано:
S1=400 m
S2=240 m
V1=54 km/h
V2=90 km/h
T1=?
T2=?​
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