u1=9km/ч=2.5м/c u=s/t. t=s/u. t1=s1/u1=540/2.5=2165c
h1(s1)=540m s2=540m+540m=1080m.
u2=18km/ч=5m/с t2=1080/5=216c.
t2-?
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Дано: Решение
u1=9km/ч=2.5м/c u=s/t. t=s/u. t1=s1/u1=540/2.5=2165c
h1(s1)=540m s2=540m+540m=1080m.
u2=18km/ч=5m/с t2=1080/5=216c.
t2-?