6 Two Cars P And Q Are Travelling Along A Motorway In The Same Direction The Leading Car P Travels At The Steady Speed 1 (62.01 KiB) Viewed 42 times
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6. Two cars P and Q are travelling along a motorway in the same direction. The leading car P travels at the steady speed of 12 m/s; the other car Q, travelling at the steady speed of 20 m/s, sounds its horn to emit a steady note which P's driver estimates, has a frequency of 830 Hz. What frequency does Q's own driver hear? (Speed of sound = 340 m/s).
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