Question

the velocity of a wave length in medium is 1200m/s and its wave length is 1•25km. then calculate the frequency?

Answer 1

velocity=1200m/s
wave length= 1.25km= 1.25*1000=1250m
velocity= wave length/time period
=> time period= wavelength / velocity
=1250/1200 s
frequency= 1/time period

Answer 2

using ,

v = f × wavelength

= f = v / wavelength

= f = 1200 / 1.25 × 1000

= f = 0.96HZ