The mass and volume of a body are $4.237 g$ and $2.5 c{m}^3$, respectively. The density of the material of the body in correct significant figures is

Here, mass, $m=4.237 g$

Volume, $V=2.5 c{m}^3$

Density, $\rho =\frac{Mass}{Volume}=\frac{4.237 g}{2.5 c{m}^3}=1.6948 g c{m}^{-3}$

As mass has $4$ significant figures and volume has $2$ significant figures, therefore, as per rule, density will have only two significant figures. Rounding off to two significant figures, we get, $\rho =1.7 g c{m}^{-3}$.