Question

Write a Java expression to accept radius, height, from the user to calculate and display:

1. The diameter of a circle: 2×radius

2. The circumference of a circle: 2πr

3. Area of a circle: πr²

4. Surface Area of a cylinder: 2πrh+2πr²

5. Volume of a cylinder: πr²h​

Answer 1

Answer:

1. Diameter of a Circle = 2r = 2 * radius

2. Area of a circle is: A = πr² =  π * radius * radius

3. Circumference of a Circle = 2πr = 2 * π * radius5. The Volume of a Cylinder is Volume of a Cylinder = πr²h

Volume of a Cylinder = Math.PI * radius * radius * height

Volume of a Cylinder = 3.14 * 4 * 4 * 6

Volume of a Cylinder = 301.44

4. The Lateral Surface Area of a Cylinder is

LSA = 2πrh

LSA = 2 * Math.PI * radius * height

LSA = 2 * 3.14 * 4 * 6

LSA = 150.72

Surface Area of a Cylinder= 2πr² + 2πrh

It can also be written as

Surface Area of a Cylinder = 2πr (r+h)

Surface Area of a Cylinder = 2 * Math.PI * radius * (radius + height)

Surface Area of a Cylinder = 2 * 3.14 * 4 * (4 + 6)

Surface Area of a Cylinder = 251.2