设 去已地花了 X小时 返回甲地花了Y 小时
则
x + y = 7.5
40x = 60y
x = 7.5-y
40(7.5-y) = 60y
300 - 40y = 60y
300 = 100y
y =3
x + 3 = 7.5
x = 4.5
4.5* 40 = 180KM
所以甲乙两地相距 180KM
设 去已地花了 X小时 返回甲地花了Y 小时
则
x + y = 7.5
40x = 60y
x = 7.5-y
40(7.5-y) = 60y
300 - 40y = 60y
300 = 100y
y =3
x + 3 = 7.5
x = 4.5
4.5* 40 = 180KM
所以甲乙两地相距 180KM