Hi, thank you for posting your question here at Brainly.
This can be solved by using the Doppler Effect equation
[tex] f_{L} = f_{s} (v+ v_{L} )/(v- v_{s} )[/tex]
where fL = frequency the listener hears
fs = frequency of the source
v = velocity of sound in air
vL = velocity of listener, (+) if moving towards source
vs = velocity of source, 0 if stationary
v as a function of temp is
v = 332 + 0.6T
v = 332 + 0.6(0)
v = 332 m/s
And vL = 60 km/h = 16.67 m/s
Substituting,
[tex] f_{L} = 800 (332+16.67} )/(800- 0 )=348.67 Hz[/tex]
