1.

If the length of a train is 150 meters and it crosses a pole in 12 seconds, then the speed of the train in km/hr is1. 602. 503. 454. None of the above

Answer» Correct Answer - Option 3 : 45

Given

Length of train = 150 m

Time taken to cross the pole = 12 sec

Formula used

Distance = speed × time

\(x \ m/sec = x \times {18 \over 5} km/hr\)

Calculation

Speed of train = distance/time

⇒ 150/12 = 25/2 m/sec

\(⇒ {25 \over 2} \ m/sec = {25 \over 2} \times {18 \over 5} km/hr\)

⇒ 45 km/hr



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