Question

A source of sound vibrates with 100 Hz. The wave travels 60m in 0.2 sec. How far does the wave travel whenthe source executes
150 vibrations.
a)300 m
b)150 m
c)450 m
d)None of these

ANSWER IS 450 METRE...BUT HOW?​

Answer 1

Answer:

velocity = distance/time

=60/0.2

=300

frequency=100

so wavelength =3

distance travelled= wavelength× no. of vibration

=3×150

=450