In what time will a railway train 80 m long moving at the rate of 40 kmph pass a telegraph post on its way?  Choose the correct answer
A) 3  B) 5  C) 4  D) 6.4  E) 7.2
T = 80/40 * 18/5= 
<gadget id="calculator">80/40 * 18/5</gadget>
<output>36/5 = around 7.2</output>
7.2 sec   Answer:7.2
<result>E</result>
In what time will a railway train 80 m long moving at the rate of 40 kmph pass a telegraph post on its way?