Question

A train 400 m long is travelling at a speed
of 72 km/hr. How long will it take to cross a
telephone pole?​

Answer 1

Step-by-step explanation:

length=400m

speed=20m/s

Time=400/20

=20sec

Answer 2

Distance of train = 400

Speed = 72 km / hr = 20 m/s

Time formula = Distance / speed

$\frac{400}{20} = 20$

It takes 20 seconds to cross the telephone pole

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