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Two trains having lengths 120 m and 100 ...

Two trains having lengths 120 m and 100 m running in the opposite directions with velocities 40 km/h and 50 km/h. In what time they will completely cross each other?

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To solve the problem of how long it will take for two trains to completely cross each other, we can follow these steps: ### Step 1: Convert the velocities from km/h to m/s The velocities of the trains are given in kilometers per hour (km/h). We need to convert them to meters per second (m/s) using the conversion factor: \[ 1 \text{ km/h} = \frac{1000 \text{ m}}{3600 \text{ s}} = \frac{5}{18} \text{ m/s} \] - For the first train: \[ 40 \text{ km/h} = 40 \times \frac{5}{18} = \frac{200}{18} \approx 11.11 \text{ m/s} \] ...
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