A train 400 m long is running at a speed of 72 km/hr. How much time does it
take to cross a telegraph post?
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A train 400 m long is running at a speed of 72 km/hr. How much time does it
take to cross a telegraph post?
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Answer:
WRITE THE QUESTION CORRECTLY !
distance=400m
speed=20m/s
time=distance/speed
=400/20
=20seconds