旅游小强
设全程长为x km,预定时间为y h
x/16=y-1.25.(1)
x/8=y+5/2.(2)
(1)*16:x=16y-20.(3)
(2)*8:x=8y+20.(4)
16y-20=8y+20
8y=40
y=5
x=8*5+20=60
预定速度:x/y=60/5=12
答:预定速度为12km/h,路程全长为60km.
设全程长为x km,预定时间为y h
x/16=y-1.25.(1)
x/8=y+5/2.(2)
(1)*16:x=16y-20.(3)
(2)*8:x=8y+20.(4)
16y-20=8y+20
8y=40
y=5
x=8*5+20=60
预定速度:x/y=60/5=12
答:预定速度为12km/h,路程全长为60km.