Free Practice Question
PS · Problem Solving
705-805
Distance/Rate Problems
Two runners, A and B, start running simultaneously from the same point on a circular track of length 400 meters. They run in the same direction. Runner A's speed is 5 meters per second, and Runner B's speed is 3 meters per second. How many seconds after they start will they meet again at the starting point for the first time?
Answer Choices
Correct answer marked belowA
80
B
100
C
200
400
Correct
E
800
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Sign in to commentWhat this question tests
What it tests
Your application of distance = rate × time to trains, boats, and commuters, including relative speed.
Common trap
Mixing units (miles per hour vs. minutes) or averaging speeds — average speed is total distance over total time.
Details
Difficulty
705-805
Type
PS
Category