A hemispherical bowl is made of steel 0.25cm thick. The inner radius o

1.	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» 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.

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»

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.