Answer :

__Given__ : CSA of hemisphere = 2772 sq.cm

__To find__ : TSA of hemisphere = ?

__Formula__ : CSA of hemisphere = 2r^{2}

TSA of hemisphere = r^{2}

__Solution__ : CSA of hemisphere = 2r^{2}

⇒ 2r^{2} = 2772

2 × × r^{2} = 2772

⇒ r^{2} = = 441

⇒ r = 21 cm

TSA of hemisphere = r^{2} = 3 × × 21 × 21 = 4158 cm^{2}

∴ The total surface area of the solid hemisphere is 4158 cm^{2}.

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