Answer :

It is given in the question that,

Side of cube = 6 cm


Also, Diameter of hemisphere = 3.5 cm


Total surface area of the block= Total surface area of cube + Curved surface area of hemisphere – Area of base


.


.



=216 + 9.625


= 225.625 cm2


Hence, the total surface area of the block will be 225.625 cm2


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