# Q : 9    A right circular cylinder just encloses a sphere of radius $\small r$ (see Fig. $\small 13.22$). Find           (iii) ratio of the areas obtained in (i) and (ii).

Answers (1)
N Nehul

The surface area of the sphere = $4\pi r^2$

And,  Surface area of the cylinder = $4\pi r^2$

So, the ratio of the areas = $\frac{4\pi r^2}{4\pi r^2} = 1$

Exams
Articles
Questions