Find the solution set of the following inequation :
$\frac{x\left(x-3\right)}{x}\le -3$, when $x$ is a non-negative real number.
 

Solve the following inequation and write down the solution set $11x-4<15x+4\le 13x+14, x\in W$.

Represent the solution on a real number line.  

Solve the following inequality, write down the solution set and represent it on the real number line:

$-2+10x\le 13x+10<24+10x, x\in Z$

Solve the following inequation and represent the solution set on the number line.

$\frac{3x}{5}+2<x+4\le \frac{x}{2}+5, x\in R$

The speed of a boat in still water and the speed of the current is in ratio $5:1$. If the difference between distances covered by the boat in going $2 \mathrm{hours}$ upstream and $2 \mathrm{hours}$  downstream is $8 \mathrm{km}$.

I. Quantity I - Speed of boat in still water

II. Quantity II -A cyclist goes $30 \mathrm{km}$ in $3 \mathrm{hours}$ 

Find the relation between these two quantities.