A hemispherical bowl is made of steel 0.25cm thick. The inner radius of the bowl is 5cm. Find the outer curved surface area of the bowl.
ANSWER:
The area covered by the curved surface of a hemisphere is known as the curved surface area. In other words, the area of the hemisphere's outer surface is curved surface area.
It is given that
Inner radius of the bowl = 5cm
Thickness of the bowl = 0.25cm
External radius = 5 + 0.25 = 5.25cm
We know that
Outer curved surface area of the bowl = 2 πr2
By substituting the values
Outer curved surface area of the bowl = 2 × (22/7) × 5.252
On further calculation
Outer curved surface area of the bowl = 2 × (22/7) × 27.5625
So we get
Outer curved surface area of the bowl = 173.25 cm2
Therefore, the outer curved surface area of the bowl is 173.25 cm2.
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