Two trains are moving towards each other from opposite directions. One is travelling at 80km/h and one is travelling at 70km/h. What is the speed of the two trains relative to each other in km/h? Explain how you came to this answer and show your working out.

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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h o h o hope you have a merry christmas!

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