Question 4:
A cubical block of side 7 cm is surmounted by a hemisphere. What is the greatest diameter the hemisphere can have? Find the surface area of the solid. [Use π = 22/7]
Answer:
From the figure, it can be observed that the greatest diameter possible for such hemisphere is equal to the cube’s edge, i.e., 7cm.
Radius (r) of hemispherical part = 7/2 = 3.5cm
Total surface area of solid = Surface area of cubical part + CSA of hemispherical part − Area of base of hemispherical part
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