KEAM 2019 Physics and Chemistry Paper

Given, time in which an echo is received =0.1s and speed of sound in air =330m/s
Since, the echo received by bat travelled a distance double to the distance between bat and object.
∴‌‌2D=v×( time )
where, D= distance between bat and object and v= speed of sound.
⇒‌‌D=‌

v×‌ time ‌

2

=‌

330×0.1

2

=16.5m