AMC 8 2016 Problem 16

AMC8 2016 年第 16 题

行程问题★★★☆☆

Annie and Bonnie are running laps around a 400 -meter oval track. They started at the same time, at the same place, but Annie has pulled ahead because she runs 25% faster than Bonnie. How many laps will Annie have run when she first passes Bonnie?

和 Bonnie 绕着 400 米椭圆跑道跑步。他们同时起跑，但是因为 Annie 的速度比 Bonnie 快了 25％，所以她跑到了 Bonnie 的前面。当 Annie 第一次经过 Bonnie 时，Annie 已经跑了多少圈了？

A. $1\dfrac{1}{4}$
B. $3\dfrac{1}{3}$
C.4
D.5
E.25

正确答案 · Correct Answer

解析 · Solution

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