A train has just completed a U-curve in ...

A train has just completed a U-curve in a track which is a semicircle. The engine is at the forward end of the semi-circular part of the track while the last carriage is at the rear end of the semi-circular track. The driver blows a whistle of frequency 200 Hz. Velocity of sound is `340 m//s`. Then the apparent frequency as observed by a passenger in the middle of a train when the speed of the train is `30 m//s` is

219 Hz

188 Hz

200 Hz

181 Hz

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TARGET PUBLICATION-Sound-Exercise

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