Question

504 cone each diameter is 3.5 and height is 3 cm are melted and recast into a metallic sphere find diameter of sphere and its surface areas

Answer 1

r=10.5
diameter=10.5×2
=21cm.
Now, surface area of sphere
=4×(22/7)×r^2
=4 ×22×1.5×10.5
=1386 sq.cm.
..hence ,
diameter of sphere =21 cm
surface area of sphere =1386 sq.cm.

Answer 2

hope it helps...?!!!