Question

a cubical block of side 7 cm is surmounted by a hemisphere . what is the greatest diameter that hemisphere can have?also find the surface area of the solid.

Answer 1

The greatest diameter that a hemisphere can have is 7cm..
Radius (r) of hemispherical part = 3.5cm

Total surface area of solid =)
Surface area of cubical part + CSA of hemispherical part− Area of base of hemispherical part.

=)6(side)2 +2πr2-πr2
=) 6 (7)2 +πr2

=) 6(7×7) + 22/7 × 7/2× 7/2
=) 294+38.5
=)332.5cm2..





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