volume of a cylinder problems please help

Step-by-step explanation:

Part A

The formula for determining the volume of a cylinder is expressed as

Volume = πr²h

Where

r represents the radius of the cylinder.

h represents the height of the cylinder.

π is a constant whose value is 3.14

1) radius = diameter/2 = 4/2 = 2 inches

Volume = 3.14 × 2² × 10 = 125.6 inches³

2) Volume = 3.14 × 20² × 50 = 62800 cm³

3) radius = 16/2 = 8 mm

Volume = 3.14 × 8² × 10 = 2009.6 mm³

4) Volume = 3.14 × 9² × 9 = 2289.06 ft³

Part B

The formula for determining the volume of a sphere is expressed as

Volume = 4/3πr³

Where

r represents the radius of the sphere.

5) Volume = 4/3 × 3.14 × 5³ = 523.3 cm³

6) radius = 24/2 = 12 inches

Volume = 4/3 × 3.14 × 12³ = 7234.56 inches³

7) Volume = 4/3 × 3.14 × 1³ = 4.2 ft³

8) radius = 42/2 = 21 mm

Volume = 4/3 × 3.14 × 21³ = 38772.72 mm³

answer: input the dimensions of the room to be painted. click the button to calculate the amount of paint and man-hours needed for this job.

interior paint coverage depends on the brand of paint used. the coverage amount is listed on the label of the paint can. use this to adjust the values in the paint coverage section below. paint usually is applied at 350 to 400 square feet per gallon (primer at 200 to 300 square feet per gallon).

step-by-step explanation: