Best Answer

7 1/2 inches = .625 feet

so...

3X18.625=55.875square feet

you will need extras for waste and doorways... It can add up fast...

Q: How do you get the square footage of a hallway when the hallway is 3 feet wide and 18 feet 7 12 inch long?

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Square footage (surface area) of a 36 inch diameter sphere = 4pir2 pi = 3.1416 r = 1/2 X diameter You asked for square footage; so first convert 36 inches to feet 36 inches / 12 inches/foot = 3 feet r = 1/2 X 3 feet = 1.5 feet surface area = 4 X 3.1416 X (1.5 feet)2 = 28 square feet

I believe 8 feet 6 inch radius and 8 feet 6 inch is 8.5 feet Area of circle is pi x radius x radius = pi x 8.5 x 8.5 = 226.98 square feet

To calculate the square footage, we need everything in feet or in inches. Since we are going to end in square feet, it is easiest to convert everything to feet first. 7 inches is equal to 7/12 feet, since there are 12 inches in a foot. 4 feet and 7 inches is equal to 4 and 7/12 feet, or 55/12 feet if you make it into an improper fraction. Then you simply multiply 7/12 and 55/12 together to get the square footage, which would be 385/12 feet, or 32 feet and 1 inch.

Diameter = 20 inch => radius = 10 inches = 10/12 feet. So area = pi*(10/12)^2 = 2.1817 sq feet approx.

2.78 square feet.

Related questions

Square footage (surface area) of a 36 inch diameter sphere = 4pir2 pi = 3.1416 r = 1/2 X diameter You asked for square footage; so first convert 36 inches to feet 36 inches / 12 inches/foot = 3 feet r = 1/2 X 3 feet = 1.5 feet surface area = 4 X 3.1416 X (1.5 feet)2 = 28 square feet

I believe 8 feet 6 inch radius and 8 feet 6 inch is 8.5 feet Area of circle is pi x radius x radius = pi x 8.5 x 8.5 = 226.98 square feet

To calculate the square footage, we need everything in feet or in inches. Since we are going to end in square feet, it is easiest to convert everything to feet first. 7 inches is equal to 7/12 feet, since there are 12 inches in a foot. 4 feet and 7 inches is equal to 4 and 7/12 feet, or 55/12 feet if you make it into an improper fraction. Then you simply multiply 7/12 and 55/12 together to get the square footage, which would be 385/12 feet, or 32 feet and 1 inch.

Convert both measures into feet.Multiply these together.

Diameter = 20 inch => radius = 10 inches = 10/12 feet. So area = pi*(10/12)^2 = 2.1817 sq feet approx.

2.78 square feet.

2.77 square feet.

2" = .1667 feet, therefor 2"x 6' = .1667'x 6' = 1 square foot

2.25 square feet.

The answer will depend on the dimensions of 14 x 14. It should be obvious to you that the square footage of a 14 inch * 14 inch area will be somewhat different from that of a 14 mile x 14 mile area!

square feet

2.1234