The angle of $1^\circ$ (degree) will be equal to:
(Use $360^\circ=2\pi$ rad)
1. $1.034\times10^{-3}$ rad
2. $1.745\times10^{-2}$ rad
3. $1.524\times10^{-2}$ rad
4. $1.745\times10^{3}$ rad

The sum of the numbers $436.32,227.2,$ and $0.301$ in the appropriate significant figures is:

The radius of a circle is stated as $2.12$ cm. Its area should be written as:

The mass and volume of a body are $4.237~\text{g }$ and $2.5~\text{cm}^3,$ respectively. The density of the material of the body in correct significant figures will be:
1. $1.6048~\text{g cm}^{-3}$
2. $1.69~\text{g cm}^{-3}$
3. $1.7~\text{g cm}^{-3}$
4. $1.695~\text{g cm}^{-3}$

The numbers $2.745$ and $2.735$ on rounding off to $3$ significant figures will give respectively, 

Each side of a cube is measured to be $7.203~\text{m}$. What are the total surface area and the volume respectively of the cube to appropriate significant figures?