t 1 =
S 1
V 1 =
96cm
0.8cm/s =120s ,
t 2 =
S 2
V 2 =
500m
5m/s =100s ,
100S<120S,所以能跑到安全区.
答:能在爆破前跑到离爆炸点500m远的安全区.