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> 小强的爸爸开汽车到距离xkm外的单位去上班,在正常情况下经过yh可以到达.但是有一天由于汽车需要维修晚出发zh,小强的爸爸每小时应该多走多少km,才能按时到达单位?-数学
小强的爸爸开汽车到距离xkm外的单位去上班,在正常情况下经过yh可以到达.但是有一天由于汽车需要维修晚出发zh,小强的爸爸每小时应该多走多少km,才能按时到达单位?-数学
题目简介
小强的爸爸开汽车到距离xkm外的单位去上班,在正常情况下经过yh可以到达.但是有一天由于汽车需要维修晚出发zh,小强的爸爸每小时应该多走多少km,才能按时到达单位?-数学
题目详情
小强的爸爸开汽车到距离xkm外的单位去上班,在正常情况下经过yh可以到达.但是有一天由于汽车需要维修晚出发zh,小强的爸爸每小时应该多走多少km,才能按时到达单位?
题型:解答题
难度:中档
来源:不详
答案
由题意可知,正常情况下汽车的速度为
class="stub"x
y
km/h,如果晚出发zh并且按时到达单位的速度为
class="stub"x
y-z
km/h,
根据题意,得
class="stub"x
y-z
-
class="stub"x
y
=
xy-x(y-z)
y(y-z)
=
class="stub"xz
y
2
-yz
.
答:小强的爸爸每小时应该多走
class="stub"xz
y
2
-yz
km,才能按时到达单位.
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题目简介
小强的爸爸开汽车到距离xkm外的单位去上班,在正常情况下经过yh可以到达.但是有一天由于汽车需要维修晚出发zh,小强的爸爸每小时应该多走多少km,才能按时到达单位?-数学
题目详情
答案
根据题意,得
答:小强的爸爸每小时应该多走