Frequency of Reflected Waves from Moving Truck: 0.0620 MHz

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A stationary motion detector emits sound waves at a frequency of 0.0620 MHz towards a truck moving at 40.5 m/s. To find the frequency of the waves reflected back to the detector, the Doppler effect must be applied. The frequency increases as the truck approaches, calculated using the formula f' = f (v + v0) / (v - vs), where f is the emitted frequency, v is the speed of sound, v0 is the speed of the observer (0 for stationary), and vs is the speed of the source (the truck). After applying the values, the reflected frequency can be determined. Engaging with the provided resources and attempting the calculations will enhance understanding.
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A stationary motion detector sends sound waves of frequency 0.0620 MHz toward a truck approaching at a speed of 40.5 m/s. What is the frequency of the waves reflected back to the detector? (Take the speed of sound to be 343 m/s.)

Please provide a solution rather than just an answer :) I really appreciate any help!
 
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