Question

A train of length 450 m crosses a pole with a speed of 72 km/h. How long will it take
to cross the pole ?​

Answer 1

Answer:

let S=450m, u=72km/hr t=?

Step-by-step explanation:

let us convert speed in kmph to m/s

i.e u=72×5/18m/s

=20m/s

Now use the formula, S=u×t

450=20×t

t=450/20

=12.5seconds

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