If the time period of a wave is$\mathrm{ }0.01 \mathrm{second}$, and velocity is $15 \mathrm{m}/\sec .$ What is the wavelength of the wave?

If the time period of a wave is$\mathrm{ }0.01 \mathrm{second}$, and velocity is $15 \mathrm{m}/\sec .$ The wavelength of the wave will be $0.15 \mathrm{m}$.
Given:
Speed of wave $\left(\mathrm{s}\right)=15 \mathrm{m}/\sec .$
Time period $\left(\mathrm{T}\right)=0.01 \mathrm{second}$
We know
$\mathrm{frequency}\left(\mathrm{f}\right)=\mathrm{ }\frac{1}{\mathrm{time}period}$$= \frac{1}{0.01}$
$\mathrm{frequency}\left(\mathrm{f}\right)=\mathrm{ }100 \mathrm{Hz}$
We know the formula,
$\mathrm{Speed} \mathrm{of} \mathrm{the} \mathrm{wave} \left(\mathrm{s}\right)= \mathrm{wavelength}\left(\mathrm{\lambda }\right)\mathrm{ }\times \mathrm{frequency}\left(\mathrm{f}\right)$
$\Rightarrow \mathrm{wavelength}\left(\mathrm{\lambda }\right)=\frac{\mathrm{speed} \mathrm{of} wave}{\mathrm{frequency}}$

$=\frac{15}{100}$

$=0.15 \mathrm{m}$