A 160 m long train moves for 170 seconds at a constant speed of 7 m/s. The train initially travels towards the East and then at a sharp bend it suddenly turns and moves towards the North without changing its speed. The displacement magnitude of the engine driver is 850 m. If the displacement magnitude of the rear guard is 910 m, find the time duration for which the rear guard was travelling North.
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because i dont know answer but i think ot will be right
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