In what time will a railway train 30 m long moving at the rate of 36 kmph pass a telegraph post on its way? Choose one.
A) 6 sec  B) 7 sec  C) 3 sec  D) 9 sec  E) 2 sec
T = 30/36 * 18/5= 
<gadget id="calculator">30/36 * 18/5</gadget>
<output>3</output>
3 sec   Answer:3 sec
<result>C</result>
In what time will a railway train 30 m long moving at the rate of 36 kmph pass a telegraph post on its way?