飞机在两城市间飞行,顺风要3h,逆风3.5h,已知风速24km/h,则两城间的距离是?km
问题描述:
飞机在两城市间飞行,顺风要3h,逆风3.5h,已知风速24km/h,则两城间的距离是?km
答
设飞机速度x
(x-24)*3.5 = (x+24)*3
(x-24)*7 = (x+24)*6
7x-24*7 = 6x+24*6
x =24*13 = 312
距离等于 (312+24)*3=1008