The diameter and thickkness of a hollow metals sphere are 12 cm and 0.01 m respectively. They density of the metal is 8.88 gm per cm^3.
Find the outer surface area and mass of the sphere.
Given
For hollow metal sphere
Outer radiu `=r^(2)=("Diameter")/(2)`
`=12/2=6cm`
Thickness `=x=0.01m =0.01 xx 100cm`
Thickness =x=1cm
Inner radius `=r_(1)=r_(2)-x`
Density `=8.88 gm per cm^(3)`
To find (i) Outer surface area
(ii) Mass of sphere

Answer

3385.94 gm