Solve the given two equations and provide the correct answer from the given options.
$I.$ $3x^2 - (6 + \sqrt{17})x + 2\sqrt{17} = 0$
$II.$ $5y^2 - (15 - \sqrt{17})y - 3\sqrt{17} = 0$

$Quantity$ $1$: Height of the tank if the volume of a cylindrical tank is $12320 \, cm^3$. Its radius and height are in the ratio of $7:10$ respectively. $Quantity$ $2$: Height of the kerosene level in a jar if a cone of radius $2 \, cm$ and height $3 \, cm$ is melted and recast into a cylinder of radius $2 \, cm$.

Find the value of $k$ so that the sum of the roots of the equation $3 x^{2}+(2 k+1) x-k-5=0$ is equal to the product of the roots:

The value of $k$ for which one of the roots of $x^2 - x + 3k = 0$ is double of one of the roots of $x^2 - x + k = 0$ is

If $m - 5n = 2$,then the value of $(m^3 - 125n^3 - 30mn)$ is

If $\alpha$ and $\beta$ are the roots of the equation $x^2 - 2x + 3 = 0$,then the equation whose roots are $\frac{1}{\alpha^2}$ and $\frac{1}{\beta^2}$ is: