Question

Tell the answer Fast with steps and methods please but do it step by step.

Answer 1

Here is your answer mate ☺️
v = 1/T........(1)
wavelength = 2 cm
velocity of the wave = 16 m/s
speed = distance / time 
16 m/s = 2 cm/time 
time = 16 m/s / 0.02 m
time = 800 s
substituting this in equation (1), we get;
v = 1/800 s

Answer 2

$\huge\blue{ꫝꫀꪶꪶꪮ}$

$v = \frac{1}{t}$

$wavelength = 2cm$

$velocity \: of \: the \: wave \: = 16 \frac{m}{s} \\ s = \frac{d}{t} \\ 16 \frac{m}{s} = \frac{2cm}{t} \\ t = \frac{16 \frac{m}{s} }{0.02m}$

$t = 800s$

$substituting \: this \: in \: equation \: {1}^{st} . \\ we \: get \\ v = \frac{1}{800s}$