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## Explanation

â€śA train 100 meter long is running at the speed of 30 km/hâ€ť. In the first step, this speed will be changed to m/sec.

Time = Distance/Speed

With the help of speed distance formula; time can be easily calculated.

## To Find

Time = ?

## Solution

Given speed = 30 km/h

Speed in m/sec = (30 x 1000)/3600 = 75/9 m/sec

Given Length = 100 meter

Time = (100 x 9)/75

**Time = 12 sec answer**

### Conclusion

A train 100 meter long is running at the speed of 30 km/h. The train will pass a man standing near the railway line in **12 seconds**.