How long does a train 150 m long traveling at 36 kmph takes to cross a signal post?  Choices:
A) 8 sec  B) 15 sec  C) 20 sec  D) 10 sec  E) 22 sec
D = 150 m   S = 36 * 5/18= 
<gadget id="calculator">36 * 5/18</gadget>
<output>10</output>
10   T= 150 * 1/10= 
<gadget id="calculator">150 * 1/10</gadget>
<output>15</output>
15 sec   ANSWER:15 sec
<result>B</result>
How long does a train 150 m long traveling at 36 kmph takes to cross a signal post?