数学 《一课一练》 5
甲、乙两车同时从相距480千米的两地相向而行,4小时后在途中相遇。已知甲、乙两车的速度的比是13:11,甲、乙两车每小时各行多少千米?急急急急急急急急急急急急急急急急急急...
甲、乙两车同时从相距480千米的两地相向而行,4小时后在途中相遇。已知甲、乙两车的速度的比是13:11,甲、乙两车每小时各行多少千米?
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4*X+4*Y=480
13*X=11*Y
可求出X,Y 两个值
X=55 Y=65
甲为55KM/H 乙为65KM/H
13*X=11*Y
可求出X,Y 两个值
X=55 Y=65
甲为55KM/H 乙为65KM/H
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设甲速度为x,则乙的速度为11x/13,z则
(x+11x/13)*4=480
x=65,所以甲速度为65千米,乙速度为55千米
(x+11x/13)*4=480
x=65,所以甲速度为65千米,乙速度为55千米
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