In what time will a railway train 40 m long moving at the rate of 36 kmph pass a telegraph post on its way?
Choose the correct choice.
A) 3
B) 5
C) 9
D) 4
E) 7
T = 40/36 * 18/5= 
<gadget id="calculator">40/36 * 18/5</gadget>
<output>4</output>
4 sec   Answer:4
<result>D</result>
In what time will a railway train 40 m long moving at the rate of 36 kmph pass a telegraph post on its way?