A man standing in front of a mountain beats a drum at

Last updated: 6/13/2023

A man standing in front of a mountain beats a drum at regular intervals The drumming rate is gradually increased and he finds that echo is not heard distinctly when the rate becomes 40 per minute He then moves near to the mountain by 90 metres and finds that echo is again not heard distinctly when the drumming rate becomes 60 per minute Calculate a the distance between the mountain and the initial position of the man and b the velocity of sound