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## Explanation

Two thing are provided in this question “a train 280 meter long, running with a speed of 63 km/h”.

In the first step, speed will be changed to m/sec and then time would be determined with the help of speed distance formula.

Time = Distance/Speed

## To Find

Time = ?

## Solution

Given speed = 63 km/h

Speed in m/sec = (63 x 1000)/3600

Speed in m/sec = 17.5 m/sec

Now,

Time = distance/speed

Time = 280/17.5

**Time = 16 sec answer**

### Conclusion

A train 280 meter long, running with a speed of 63 km/h will pass a tree in **16 seconds**.