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

Question

Quizplus · Accepted Answer

To find when Cory and Melissa's cars will both reach the starting point simultaneously, we need to find the least common multiple (LCM) of their lap times. The LCM of 40 and 35 seconds is 280 seconds. This is the first time both cars will be at the starting point together after they start racing.

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