Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.4 | Question 8

Question 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.

Sphere – Surface area

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Surface area of sphere = 4πr²

r = radius of sphere

Lateral or curved surface area of hemisphere = 2πr²

Total surface area of hemisphere = 2πr² + πr² = 3πr²

r = radius of sphere

What is Area / Surface area / Volume

It is recommended to understand the core concept of area, surface area and volume before we attempt any question based on these concepts.

 

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