3. A train of length 360 m crosses a pole in 18 sec, then what is the speed of the
train ?
1) 90 km/hr 2) 72 km/hr 3) 120 km/hr 4) 80 km/hr
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Answer:
2) 72 km/hr
Explanation:
Length of train=360m
Time taken to cross pole=18 sec
Speed= length/time
=360/18
=20 m/s
=20 x 18/5 km/hr
=72 km/hr
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