TS EAMCET 7 May 2024 Shift 1 Solved Paper

The frequency of sound heard by a stationary observer is f , when the source of sound is approaching the observer with a speed of 10% of the speed of sound. If the same source of sound is moving away from the stationary observer with a speed of 20% of the speed of sound, the frequency of sound heard by the observer is f2. Then f1 : f2 is