A bat emits ultrasonic waves of frequency 39 kHz and receives and echo 0.2 s later. If the speed
Channel: Doubtnut
Date: 2020-06-07

A bat emits ultrasonic waves of frequency 39 kHz and receives and echo 0.2 s later. If the speed of sound in air is 300 m/s and the speed of electro magnetic waves `3 xx 10^(8) m//s` then the distance of the bat from the object producing the echo is