In what time will a train 40 m long cross an electric pole, it its speed be 144 km/hr?  Choose the correct choice from the following.
A) 2.5 sec B) 1.0 sec C) 7.5 sec D) 2.3 sec E) 1.5 sec
Speed = 144 * 5/18= 
<gadget id="calculator">144 * 5/18</gadget>
<output>40</output>
40 m/sec   Time taken= 40/40= 
<gadget id="calculator">40/40</gadget>
<output>1</output>
1.0 sec.   Answer:1.0 sec
<result>B</result>
In what time will a train 40 m long cross an electric pole, it its speed be 144 km/hr?