Annie and Bonnie are running laps around a 400-meter oval track. They started together, but Annie has pulled ahead because she runs 25% faster than Bonnie. How many laps will Annie have run when she first passes Bonnie?
A. $1\frac{1}{4}$
B. $3\frac{1}{3}$
C. 4
D. 5
E. 25

It won't just hand you the answer — it asks where you're stuck.How the checker works

Worked solution

1. 2016 AMC 8 官方解析

翻译：安妮和邦妮在长400米的一个椭圆形运动场跑步．他们同时同地同向出发，安妮的速度比邦妮快25%，那么当安妮第一次追上邦妮的时候，安妮跑了多少圈？
设邦妮的速度为4，则安妮的速度为 $4 \times (1 + 25\%) = 5$ ， $400 \div (5 - 4) \times 5 \div 400 = 5$ （圈）．

Answer

D. 5

AI analysis — may contain mistakes.

Worked this one out on paper? Snap your steps and Gigle's AI math checker will circle the step where it went wrong.

Annie and Bonnie are running laps around a 400-meter oval track. They started together, but Annie has pulled ahead because she runs 25% faster than Bonnie. How many laps will Annie have run when she first passes Bonnie?A. 1141\frac{1}{4}141​B. 3133\frac{1}{3}331​C. 4D. 5E. 25

Worked solution

More questions on this topic

Annie and Bonnie are running laps around a 400-meter oval track. They started together, but Annie has pulled ahead because she runs 25% faster than Bonnie. How many laps will Annie have run when she first passes Bonnie?
A. $1\frac{1}{4}$
B. $3\frac{1}{3}$
C. 4
D. 5
E. 25