A car fitted with a device which transmits sound 60 times per minute. There is no wind and speed of sound in still air is 345 m/. If you hear the sound 68 times per minute when you are moving towards the car with a speed of 12 m/, the speed of the car must be nearly.
(A) 20.0 m/* towards you
(B) 30.0 m/* towards you
(C) 10.0 m/* away from you
(D) 10.0 m/* towards you
