Question

find the surface area of sphere if a right circular cylinder just enclosed a sphere a radius r​

Answer 1

Step-by-step explanation:

(i) SA of sphere =4πr

2

(ii) Height =r+r=2r

radius =r

⇒Curved Surface Area=2πrh=2πr(2r)=4πr

2

(iii) Ratio =

4πr

2

4πr

2

=

1

1

or 1:1

Answer 2

Surface area of sphere if a right circular cylinder just enclosed a sphere a radius r is...

${4\pi \: r}^{2}$

pls mark brainlist..