Solve the Problem. -Cory and Melissa Are Racing Electronic Cars Around a Circular

Multiple Choice

Solve the problem.
-Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 40 seconds, while Melissa's car completes a revolution in 35 seconds. How long will it take them before both cars reach the starting point again simultaneously?

A) 56 seconds
B) 280 seconds
C) 112 seconds
D) 560 seconds