In what time will a train 100 meters long cross an electric pole, if its speed is 90 km/hr	Choose the correct choice from the following answers
A) 8.5 seconds B) 2.8 seconds C) 3.5 seconds D) 2.5 seconds E) 4 seconds
First convert speed into m/sec   Speed = 90*(5/18)= 
<gadget id="calculator">90*(5/18)</gadget>
<output>25</output>
25 m/sec   Time= Distance/speed   = 100/25= 
<gadget id="calculator">100/25</gadget>
<output>4</output>
4 seconds   Answer: 4 seconds
<result>E</result>
In what time will a train 100 meters long cross an electric pole, if its speed is 90 km/hr