In what time will a train 120 m long cross an electric pole, it its speed be 144 km/hr? Choose the correct option: A) 2.5 sec B) 3 sec C) 8.9 sec D) 6.9 sec E) 2.9 sec
Speed = 144 * 5/18= 
<gadget id="calculator">144 * 5/18</gadget>
<output>40</output>
40 m/sec   Time taken= 120/40= 
<gadget id="calculator">120/40</gadget>
<output>3</output>
3 sec.   Answer: 3 sec
<result>B</result>
In what time will a train 120 m long cross an electric pole, it its speed be 144 km/hr?