//Example 11 //  Velocity of sound
clc;
clear;
close;
//given data :
lamda1=5;// in m
lamda2=5.5;// in m
a=6;// beats/sec
v=a/((lamda2-lamda1)/(lamda1*lamda2));
disp(v,"The velocity of sound,v(m/s) = ")