Rachel is running at a pace of 4 m/s, and her friend Ally is running at 5 m/s. If they have 1 mile to go before reaching home, how much sooner will Ally get home before Rachel?
A)30 seconds
B)80 seconds
C)120 seconds
D)150 seconds
E)180 seconds

Question

Quizplus · Accepted Answer

1 mile can be approximated as 1600 meters (exact is 1609 meters). Thus, Rachel will run one mile in 400 seconds, and Ally will run one mile in 320 seconds. This means Ally will beat Rachel home by 80 seconds.

Rachel Is Running at a Pace of 4 M/s, and Her