Question

Ans the attachement​

Answer 1

Answer:

Hey!

Given 53cm= 2λ

λ=106cm

v=λf= 100106×320= 339 m/s

Hope it will be helpful ✌️

Answer 2

The answer will be

Option b) 339 m/s

$lambda/2 = (73-20) ×10^-2$

$lambda = 2× (73-20) × 10^-2$

$velocity of sound , v= n*lambda$

$2×320[73-20]×20^-2$

$339.2 m/s$