Vikas TU
Last Activity: 8 Years ago
Doppler's effect of frequency of source of sound when source is stationary and the observer is moving away from source of sound is given by:
ν' = ν ×(v-vo)/v
We are given ν' =90/100 ν, v = 300m/s and v0 = 2√s
Therefore 90/100 ν = ν x(300−2√s)/300
or 270 = 300−2√s
or 2√s = 30
or s = 225m