$A$ sound wave of length $70 \ cm$ travels $840 \ m$ in $2.5 \ s$. What is the velocity and frequency of the sound?

(N/A) The velocity $(v)$ of the sound wave is calculated by dividing the total distance traveled by the time taken:
$v = \frac{\text{Distance}}{\text{Time}} = \frac{840 \ m}{2.5 \ s} = 336 \ m/s$.
The frequency $(f)$ of the sound wave is calculated using the formula $v = f \times \lambda$,where $\lambda$ is the wavelength.
Given $\lambda = 70 \ cm = 0.7 \ m$ and $v = 336 \ m/s$:
$f = \frac{v}{\lambda} = \frac{336 \ m/s}{0.7 \ m} = 480 \ Hz$.