& A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowlis
5 cm. Find the outer curved surface area of the bowl.
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gft kchu khbo high bujhbi oh
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r=5cm, thickness of steel sheet =0.25cm
⇒ R=5cm+0.25cm=5.25cm
the outer curved surface area of the bowl =2πR ^2
=2× 22 /7 × 525 /100 × 525/ 100 cm^2
=173.25cm ^2
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