Physics - Fluid Question with Solution | TestHub

A square hole of side length $\ell$ is made at a depth of $\mathrm{h}$ and a circular hole of radius $\mathrm{r}$ is made at a depth of $4\mathrm{h}$ from the surface of water in a water tank kept on a horizontal surface. If $\ell <<h,r<<h$ and the rate of water flow from the holes is the same, then $r$ is equal to