Two goods trains 132 m and 108 m in length are running towards each other on parallel tracks. The first train is running at a speed of 32 km/h and the second at a speed of 40 km/h. How much time will they take to cross each other after meeting?

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Step 1: Convert speeds from km/h to m/s.
- Speed of first train = 32 km/h = (32 × 1000) / 3600 = 8.89 m/s
- Speed of second train = 40 km/h = (40 × 1000) / 3600 = 11.11 m/s

Step 2: Calculate relative speed when trains move towards each other.
Relative speed = 8.89 + 11.11 = 20 m/s

Step 3: Calculate total length to be crossed.
Total length = 132 m + 108 m = 240 m

Step 4: Calculate time taken to cross each other.
Time = Total length / Relative speed = 240 / 20 = 12 seconds

Therefore, the trains will take 12 seconds to cross each other after meeting.

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