Question

The man of mass 50 kg is on the platform of mass 150 kg
moving towards left making a sound of frequency fo as
shown in the figure. The relative speed between the
man and the plank is 8 m/s towards left. The frequency
of sound detected by detector 'D', before the man
jumps off the plank is​

Answer 1

Answer:

fgh fi loses!!!

iffa gyef guhb ğ ĕ ????