Question 1163870
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The two trains are heading toward each other, so together they are closing the distance between them by the sum of their speeds.  Add the speeds together then divide the total distance they have to travel, 180km. That will give you the number of hours it will take them to meet. Add that amount of time to 12 noon.
			  
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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