Solution: Suppose the distance between Xiaohong's home and point A is X meters, and the distance between the two homes is Y meters. The time for Xiao Qiang to arrive at point A is 1 minute for the first time and b minutes for the second time. The first time: 52? x？ Answer? =? x？ [Little Red to Point A]? 70? x？ a=？ (X？ +? Y)[ Xiao Qiang arrives at point A]? The second time: (4+b)? x？ 52=? x？ [Little Red to Point A]? 90? x？ b？ =(X？ +? Y)[ Xiao Qiang arrives at point A]? Solution: Y= (m)? The distance between the two houses is 100 meter.