Two men are walking along a horizontal straight line in the same direction. The man in front walks at a speed 1.0ms^–1
Two men are walking along a horizontal straight line in the same direction. The man in front walks at a speed 1.0ms–1 and the man behind walks at a speed 2.0ms–1. A third man is standing at a height 12m above the same horizontal line such that all three men are in a vertical plane. The two walking men are blowing identical whistles which emit a sound of frequency 1430Hz. The speed of sound in air is 330ms–1. At the instant, when the moving men are 10m apart, the stationary man is equidistant from them. The frequency of beats in Hz, heard by the stationary man at this instant, is _____.
1 Answers
Can you explain the procedure you had followed in the final steps for deriving the values of f(A) and f(B)? I have a doubt in the "binomial expansion" you had used in these steps.
Please clear me out of this.