Question

A metallic spherical shell of internal and external diameter 4cm and 8cm respectively is melted and recast into the from a coneof base diameter 8cm find the height of the cne

Answer 1

since metallic spherical shell is recasted
so vol. of metallic spherical shell=vol.of cone

Therefore,
1/3 ×π×4×4×h = 4/3×π×(4^3 - 2^3)
h =14 cm. (Ans.)