JEE Mains Model Paper 3

A motor cycle starts from rest and accelerates along a straight path at 3 m/s2. At thestarting point of the motor cycle there is a stationary electric siren. How far has themotor cycle gone when the driver hears the frequency of the siren at 94% of its valuewhen the motor cycle was at rest? (speed of sound = 330 m/s2)