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2009 AMC 10A Problem 20

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2009 AMC 10A Problem 20AMC 10 Step by Step

Name: Date: September 13, 2026

Linear Equations & Word Problems · difficulty 3 of 5 · about 3 min · position P16-20

Andrea and Lauren are $20$ kilometers apart. They bike toward one another with Andrea traveling three times as fast as Lauren, and the distance between them decreasing at a rate of $1$ kilometer per minute. After $5$ minutes, Andrea stops biking because of a flat tire and waits for Lauren. After how many minutes from the time they started to bike does Lauren reach Andrea?

A)
$20$
B)
$30$
C)
$55$
D)
$65$
E)
$80$

2009 AMC 10A Problem 20

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