8.
A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is
5 cm. Find the outer curved surface area of the bowl.
inst encloses a sphere of
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5cm
0.25cm
5+0.25=5.25cm
2πr²
= 2× × (5.25)² = 172.25 cm²
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