Question Number 144890 by nimnim last updated on 30/Jun/21
Commented by nimnim last updated on 30/Jun/21
$$\mathrm{please}\:\mathrm{help}.. \\ $$
Answered by ajfour last updated on 30/Jun/21
$${Av}={volumetric}\:{flow}\:{rate}. \\ $$$${A}=\pi{r}^{\mathrm{2}} \\ $$