A vector $\overrightarrow{\mathit{A}}$ points vertically downward and $\overrightarrow{\mathit{B}}$ points towards the east, then the vector product $\overrightarrow{A}\times \overrightarrow{B}$ is

In the figure which of the ways indicated for combining the $x$ and $y$ components of the vector $\overrightarrow{a}$ are proper to determine that vector?

Let $\overrightarrow{\mathrm{a}}$ and $\overrightarrow{\mathrm{b}}$ be two non-null vectors such that $|\overrightarrow{\mathrm{a}}+\overrightarrow{\mathrm{b}}|=|\overrightarrow{\mathrm{a}}-2\overrightarrow{\mathrm{b}}|$. Then the value of $\frac{\left|\overrightarrow{\mathrm{a}}\right|}{\left|\overrightarrow{\mathrm{b}}\right|}$ maybe,
 

For a triangle shown in the figure, side $CA$ is $10 \mathrm{m}$, $\angle A$ and $\angle C$ are equal then: