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JEE Main 2023 (Online) 8th April Morning Shift
MCQ+4 / -12023
The engine of a train moving with speed \(10 \mathrm{~ms}^{-1}\) towards a platform sounds a whistle at frequency \(400 \mathrm{~Hz}\). The frequency heard by a passenger inside the train is: (neglect air speed. Speed of sound in air \(=330 \mathrm{~ms}^{-1}\) )