(i) A hemisphere of maximum possible diameter is placed over a cubical block of side \( 7 \mathr...

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(i) A hemisphere of maximum possible diameter is placed over a cubical block of side \( 7 \mathrm{~cm} \). Find the surface area of the solid so formed.(ii) A cubical block of side \( 10 \mathrm{~cm} \) is surmounted by a hemisphere. What is the largest diameter that the hemisphere can have? Find the cost of painting the total surface area of the solid so formed, at the rate of \( ₹ 5 \) per \( 100 \mathrm{sq} \mathrm{cm} \). [Use \( \pi=3.14 \).]
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