Question

two persons p and q are standing at a distance of 100m from a high wall as shown in the figure. when p gives a clap, the time interval between the two(direct and reflected) sounds heard by q is 0.2 s. if the speed of sound is 340m s^-1, then the distance d between p and q is ?

Answer 1

Answer:

$V2×100−Vd=0.2⇒340200−d=0.2⇒200−d=68∴d=200−68=132</p><p></p><p></p><p>$