how fast does an average rollercoaster goes? how much does the fastest goes?
the fastest rollercoaster in the world is "Kingda Ka", located in a SixFlags themepark in NJ. at its top speed, it runs at about 128 mph. doen't sound fast, but you have to add the height factor - 456 ft - also the heighest in the world.
I'm not sure what the average speed is, but the fast roller coaster goes 128 mph. I think it's in Jersey.
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