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.​

Answer 1

Answer:

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Step-by-step explanation:

We have,

Side of cubical block

=

7cm.

Then radius of hemisphere

=

2

7

cm=

3.5cm.

Then,

Total surface area of the solid=Total surface area of cube-Area of base of hemisphere +curved surface area of hemisphere.

⇒ TSA= 6×

7 2

π×

(3.5) 2

2π

(3.5)

2

⇒ TSA= 332.465cm

2