Question 1069683
X an Y are two stations 500 km apart. A train starts form X and moves towards Y at 20 km/hr. Another rain starts from Y at the same time and moves towards X at 30 km/hr. How far from X will they cross each other:
<pre>With D being the distance from X where they cross, we get the following TIME equation: {{{D/20 = (500 - D)/30}}}
30D = 20(500 - D) ------- Cross-multiplying
30D = 10,000 - 20D
30D + 20D = 10,000
50D = 10,000
D, or distance form X where they cross = {{{highlight_green(matrix(1,4, "10,000"/50, or, 200, km))}}}