If $\mathrm{A}=2\mathrm{h}\left(\mathrm{l}+\mathrm{b}\right)$, then $\mathrm{b}=$_____.

If $\mathrm{S}=\left(\mathrm{n}-2\right)180° \mathrm{and} \mathrm{S}=540°,$ then find $\mathrm{n}$

The sum of four angles of a quadrilateral is $360°$. From the following figure, express the relation between $\mathrm{x} \mathrm{and} \mathrm{y}$ by making $\mathrm{x}$ as the subject.

If $\mathrm{M}=\mathrm{a}+\frac{\mathrm{b}}{\mathrm{c}}$, then $\mathrm{b}=$_____.

If $\mathrm{V}=\mathrm{lbh}$, then $\mathrm{h}=$_____.

In $\mathrm{A}={\mathrm{s}}^2-{\left(\mathrm{s}-2\mathrm{w}\right)}^2,$ if $\mathrm{w}=1 \mathrm{m}$ and $\mathrm{s}=6 \mathrm{m}$, then find $\mathrm{A}$ (in ${\mathrm{m}}^2$).

Frame the formula: volume $\left(\mathrm{v}\right)$ of a cuboid is the product of its length $\left(\mathrm{l}\right)$, breadth $\left(\mathrm{b}\right)$, and height $\left(\mathrm{h}\right)$. 

If $\mathrm{S}=\frac{\left(100+\mathrm{g}\right)\mathrm{C}}{100}$ , then which of the following is/are true?

The number of auxiliary formulae that can be derived from the formula $\mathrm{D}=\left[\frac{\mathrm{n}\left(\mathrm{n}-1\right)}{2}\right]-\mathrm{n}$