# NEET Physics Waves Questions Solved

An observer standing at station observes frequency 219 Hz when a train approaches and 184 Hz when train goes away from him. If velocity of sound in air is 340 m/s, then velocity of train and actual frequency of whistle will be

(1) $15.5\text{\hspace{0.17em}}m{s}^{-1},\text{\hspace{0.17em}}200\text{\hspace{0.17em}}Hz$

(2) $19.5\text{\hspace{0.17em}}m{s}^{-1},\text{\hspace{0.17em}}205\text{\hspace{0.17em}}Hz$

(3) $29.5\text{\hspace{0.17em}}m{s}^{-1},\text{\hspace{0.17em}}200\text{\hspace{0.17em}}Hz$

(4) $32.5\text{\hspace{0.17em}}m{s}^{-1},\text{\hspace{0.17em}}205\text{\hspace{0.17em}}Hz$

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