Question

6. A sphere, a cylinder and a cone have the same radius and same height. Find the ratio of
their volumes.
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Answer 1

Answer:

Then  

Curved surface area of Sphere= 4πr²

Curved surface area of cylinder = 2πr(2r) = 4πr²

Curved surface area of cone = πrl

where, l = √(r2 + h2 ) = √( r2 + (2r)2) = √(5r2) = r√5  

⇒ Curved surface area of cone = π√5r2  

Now,  

Ratio of CSA 's a sphere ,cylinder and a cone = 4πr2:2πrh : πrl

= 4πr2:4πr2 : πr2√5

= 4 : 4 : √5

Step-by-step explanation:

Answer 2

Hi..

YOUR ANSWER:-

4r:2h:l