Question

Plz tell me.... Its urgent.... ​

Answer 1

Answer:

Explanation:

a) as given in the question the complete wave fits along the length so its wavelength is 20 cm or 0.2 m.

b) frequency is given in question itself that is 30 Hz

c) speed = wavelegth × frequency

              = 0.2 × 30

              = 6 m/s