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speed of the train? A moving train takes...

speed of the train? A moving train takes 8 seconds and 20 seconds respectively to cross a telegraph post and a 264 meter long bridge. The train What is the speed of? (a) 69.5 km / hr. (b) 70 km / hr. (c) 79 km / hr. (d) 79.2 km / hr.

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