A train 400 m in length crosses a telegraph post in 16 seconds. The speed of the train is? Answers:
A) 22 kmph
B) 77 kmph
C) 54 kmph
D) 71 kmph
E) 90 kmph
S = 400/16 * 18/5= 
<gadget id="calculator">400/16 * 18/5</gadget>
<output>90</output>
90 kmph   Answer:90 kmph
<result>E</result>
A train 400 m in length crosses a telegraph post in 16 seconds. The speed of the train is?