Question

The surface area of a sphere of radius 5 cm is 5 times a curved surface area of cone

Answer 1

Answer:

Step-by-step explanation:

Surface area of the sphere=(4π×5×5) cm²

= (100π) cm².

Curved surface area of the cone=(π×4×l) cm²

=(4πl) cm²

∴ 100π=5×(4πl) ⇒ l=5 cm.

Now, l² = h² + r²

5²= h² + 4²

h²= 9  

h= 3 cm.