- Number Systems
- Polynomials
- Factorization of Polynomials
- Linear Equations In Two Variables
- Coordinate Geometry
- Introduction To Euclids Geometry
- Lines And Angles
- Triangles
- Congruence Of Triangles And Inequalities In A Triangle
- Quadrilaterals
- Areas Of Parallelograms And Triangles
- Circles
- Geometrical Constructions
- Areas Of Triangles And Quadrilaterals
- Volume And Surface Area Of Solids
- Mean Median And Mode Of Ungrouped Data
- Probability
RS Aggarwal Solutions Class 9 Mathematics Solutions for Volume And Surface Area Of Solids Exercise 15D in Chapter 15 - Volume And Surface Area Of Solids
Prev
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.
Facebook
Whatsapp
Copy Link
Lido
Courses
Quick Links
Terms & Policies
Terms & Policies
