One train is traveling 45 kmph and other is at 10 meters a second. Ratio of the speed of the two trains is?  Choose the most appropriate option:  A) 5:4  B) 5:9  C) 5:6  D) 5:1  E) 5:7
45 * 5/18 = 10   25:20 =&gt; 5:4   5:4nswer: 5:4
<result>A</result>
One train is traveling 45 kmph and other is at 10 meters a second. Ratio of the speed of the two trains is?