Question

The metal sphere of radius 2.1 cm is melted and recast to form a cone of height 8.4 cm . Find the radius of the cone

Answer 1

Answer:

Step-by-step explanation:

Hope it helps you !!

Please mark it as the brainliest !!

Answer 2

Answer:

Given a metallic sphere of radius 2.1 cm ,is melted and recasted into a cone of height 8.4 cm.

TO FIND: Radius of cone.

Step-by-step explanation:

If the metallic sphere is melted and recasted into a cone, then volume of sphere is equal to that of cone;

⇒4/3 x 22/7 x r x r x r = 1/3 x 22/7 x r₁² x h

⇒4 x 2.1 x 2.1 x 2.1 = 8.4 x r₁²

⇒(2.1)² = r₁²

⇒r₁ = 2.1

Or, the radius of the cone is 2.1 cm.