## A girl stands 170 m away from a high wall and claps her hands at a steady rate so that each clap coincides with the echo of the one before. a) If she makes 60 claps in 1 minute, what value should be the speed of sound in air? b) Now, she moves to another location and finds that she should now make 45 claps in 1 minute to coincide with successive echoes. Calculate her distance for the new position from the wall.

After going through we can list some data as, distance d = 170 m To find a) speed v = ? b) distance d= ? Solution – a)its given that girl makes 60 claps in one minute hence she makes 1 clap in 1 sec therefore we can say that …