Two cyclists start from the same point at the same time and move in opposite directions. One cyclist is traveling at 8 mph, and the other cyclist is traveling at 9 mph. After 120 min, how many miles apart are the two cyclists?
A) 34 mi
B) 16 mi
C) 18 mi
D) 17 mi
E) 1 mi

Question

Quizplus · Accepted Answer

The two cyclists are moving away from each other, so their speeds add up. Together, they cover $8 \text{ mph} + 9 \text{ mph} = 17 \text{ mph}$. In 120 minutes (2 hours), they will be $17 \text{ mph} \times 2 \text{ hours} = 34 \text{ miles}$ apart.

Two Cyclists Start from the Same Point at the Same