A whistle of frequency 1000 Hz is sounded on a car travelling towards a cliff with velocity of 18 m s⁻¹ normal to the cliff. If c = 330 m s⁻¹, then the apparent frequency of the echo as heard by the car driver is nearly(a) 1115 Hz(b) 115 Hz(c) 67 Hz(d) 47.2 Hz
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it's answer should be the option A
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lekshmisantosh2003:
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A whistle of frequency 1000 Hz is sounded on a car travelling towards a cliff with velocity of 18 m s⁻¹ normal to the cliff. If c = 330 m s⁻¹, then the apparent frequency of the echo as heard by the car driver is nearly
(a) 1115 Hz
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