62 A truck blowing horn of frequency 500Hztravels towards a vertical mountain and driver hears echo of frequency 600Hz If - Physics - Electromagnetic Waves

Question

62 A truck blowing horn of frequency 500Hztravels towards a
vertical mountain and driver hears echo of frequency 600Hz If
velocity of sound in air is 340m/s then speed of truck is ---------

Neha Gupta · Accepted Answer

let frequency reflected by the moutain is foriginal frequency is f0f = vv+vsf0where vs is the velocity of truck600=340340-vs5006(340+vs) = 5×3402040-6vs = 17006vs = 2040-17006vs = 340vs = 56
66m/s

62.A truck blowing horn of frequency 500Hztravels towards a vertical mountain and driver hears echo of frequency 600Hz.If velocity of sound in air is 340m/s then speed of truck is ---------