Question

If a train is running at the 72km/h. If it crosses a pole in 12.5 seconds, find its length.

Answer 1

72km = 72000m
1hr = 60mins
12.5seconds = 12mins 5seconds
1min = 60mins
60mins = 60×60secs = 3600secs

3600secs = 72000km
1sec = 72000/3600m
12.5secs = 720/36×125/10m
= 20×125/10m
= 2×125m
= 250m