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2021 AMC Fall 10A Problem 4

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2021 AMC Fall 10A Problem 4AMC 10 Step by Step
Name:                             Date: September 13, 2026
Linear Equations & Word Problems · difficulty 1 of 5 · about 2 min · position P1-10

Mr. Lopez has a choice of two routes to get to work. Route A is 66 miles long, and his average speed along this route is 3030 miles per hour. Route B is 55 miles long, and his average speed along this route is 4040 miles per hour, except for a 12\frac{1}{2} -mile stretch in a school zone where his average speed is 2020 miles per hour. By how many minutes is Route B quicker than Route A?

  1. A)

    2342 \frac{3}{4}

  2. B)

    3343 \frac{3}{4}

  3. C)

    4124 \frac{1}{2}

  4. D)

    5125 \frac{1}{2}

  5. E)

    6346 \frac{3}{4}

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