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47 A train is moving with 30 m s and speed of sound in air...

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47 A train is moving with 30 m s and speed of sound in air is 340 m s Another train is moving in opposite direction with speed 15 m s then apparent frequency genereted frequency by first train is 440 Hz and observer is in second train 1 458 Hz 2 450 Hz SPMT 04 08 4 490 Hz 3 503 Hz

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