You are riding your bicycle directly away from a stationary source of sound and hear a frequency that is 1.0% lower than the emitted frequency. The speed of sound is 343 m/s. What is your speed

Explanation:

Given

apparent frequency is 1 % lower than the original frequency

Speed of sound

suppose f is the original frequency  

apparent frequency

using Doppler's formula

where  

=apparent frequency  

=velocity of sound in the given media

=velocity of source

=velocity of observer