Solution:-
We know,
[tex] \dag [/tex] Surface area of a sphere is 4πr².
Now,
Diameter (d) of a sphere = 74 mm.
So, Radius (r) of a sphere = 74/2 = 37 mm.
Hence,
Surface area of a sphere = 4 × 3.14 × (37)²
Surface area of a sphere = 4 × 3.14 × 37 × 37
Surface area of a sphere = 17,194.64 sq. mm.
The surface area of the figure above is 17,194.64 sq. mm. [Answer]
