Question

the radius and height of the sphere, cylinder and cone are same. then find the ratio of their surface area.​

Answer 1

Answer:

Given

h=r

SA(sphere)=4πr^2

SA(cylinder)=2πrh+2πr^2

4πr^2. (since h=r)

SA(cone)=πrl+πr^2. (l=√(r^2+h^2)

√2πr^2+πr^2 l=r√2

[2+√2]πr^2

Therefore

SA of sphere:SA of cylinder:SA of cone

2√2: 2√2: √2+1

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