A suspicious-looking man runs as fast as he can along a moving sidewalk from one end to the other, taking 2.50 s. Then security agents appear, and the man runs as fast as he can back along the sidewalk to his starting point, taking 10.0 s. What is the ratio of the man's running speed to the sidewalk's speed?

Explanation

To solve the problem of finding the ratio of the man's running speed (\(V_m\)) to the sidewalk's speed (\(V_s\)), we can follow these steps:

### Step 1: Define the Variables
Let:
- \(V_m\) = man's running speed (in m/s)
- \(V_s\) = sidewalk speed (in m/s)
- \(D\) = distance covered by the man on the sidewalk (in meters)

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