For Xiao Qiang, he traveled the same distance twice, namely.
79t=90(t-4)
So we get t = 360/11min.
So the distance between the two families is
(52+79)t = 47 160/ 1 1m
1.20 18 when and where is the qualification examination for special post teachers in Hongsibao District, Ningxia?
20 18 Announcement on the