A river flows at 2km/h,and john takes 6h to row 16km to up the river and 16 km back.How fast did he row?PS:answer:3.74km/h

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• A river flows at 2km/h,and john takes 6h to row 16km to up the river and 16 km back.How fast did he row?PS:answer:3.74km/h
• A river flows at 2km/h,and john takes 6h to row 16km to up the river and 16 km back.How fast did he row?
• 老师说题里的信息如果不全可以自己假设一个,比如速度不知道就可以假设这个人的速度是50.Anakin and Sebulba are pod-racing on the plante Tatooine.The race includes a sharp (90 degrees) left turn around a cliff that Anakin is approaching and Sebulla has already completed.Sebulba's speed is 500mph.Anakin's radar tells him that the distance between him and Sebulba is decreasing at a reat of 120mph.How fast is Anakin going when he is 8 miles due north of the intersection point ans Sebulba is 6 miles
• 1.正比例函数的图象经过第一.三象限,并且与反比例函数y=m/x的图象相交于P.Q两点,若点P的坐标为(1,4).(1)写出反比例函数的解析式; (2)求出点Q的坐标.2.已知等腰三角形顶角的平分线的长等于腰长的一半,求这个等腰三角形的顶角的度数.3.在△ABC中,∠C=90度,AC=3,BC=4,则AB上的高为_______________.