Question

During their last workout,Susan ran 3 1/2 miles in 30 minutes and her friend Amber ran 2 1/3 miles in 20 minutes. Each girl though she was the faster runner. Based on their last run, whaich girl is correct?

Answer 1

3 1/2 miles in 30 minutes means that Susan can run 7 miles per hour

2 1/3 miles in 20 minutes means that Amber can run 7 miles per hour.



Because $3 \frac{1}{2}\times 2 = \frac{7}{2} \times 2 = 7$

$2 \frac{1}{3}\times 3 = \frac{7}{3} \times 3 = 7$



This means that both of them run at the same speed, and that no one is faster than the other. So, both girls are wrong.