Question

4. If the speed of a wave is 380 m/s and its frequency is 1900 Hz, then the wavelength of the wave
will be:
(a) 20 m
(b) 0.2 m
(c) 200 m
(d) 2 m​

Answer 1

speed= wavelength×frequency

380=w× 1900

w= 380/1900

w=38/190

w= 2/10

w= 1/5

w= 0.2m

so answer is b option

Answer 2

Answer:

Speed=wavelength×frequency

380=w×1900

w=380÷1900

w=380÷190

w=2÷10

w=1÷5

w=0.2m

Hence,option b 0.2m is the correct answer of the given Question.