Find the surface area of the solid — task. Mathematics State Board, Class 10.

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A hemisphere is surmounted on a cubical box of side

$4.2$

$cm$ . Then, answer the following:

(i) If one end of the cubical box circumscribes the open end of the hemisphere, then what could be its diameter?

4.2
14.2
2.1

(ii) Calculate the surface area of the solid formed.

119.7
121.7
120.7

$1$

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