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The formula you need is:

area = length x width

Replace the numbers you know; solve for the number you don't know.

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Q: Are of rectangular room is 216sq ft the width is 12ft what is the length?
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Related questions

What is the length and width of a rectangle if the perimeter is 32 feet and the area is 48 square feet?

Length is 12ft, width is 4 ft. 2 x (length + width) = perimeter = 32 ft ⇒ length = 16ft - width [1] length x width = area = 48 sq ft Using [1] above: ⇒ (16ft - width) x width = 48 sq ft multiplying out and rearranging: ⇒ width2 - 16 x width + 48 = 0 factorizing: ⇒ (width - 4)x(width - 12) = 0 Thus width = 4 or 12, so using [1] above: ⇒ width = 4ft, length = 16 - 4 = 12ft or width = 12ft, length = 16 - 12 = 4ft Convention is that the length is larger than the width, thus rectangle is 12ft long by 4 ft wide.


What is the perimeter of a rectangle if the length is 12ft and the width is 16ft?

56-ft


What is the area of a rectangle with a width of 12 feet and length of 10 feet?

Area=length x width, A=lxw=10ft x 12ft=120ft2


What is the perimeter of a 12ft long and 15ft wide room?

2*(length + width) = 54 feet.


What is the area of a rectangle with a width of 12ft and length of 10ft?

To find the area of a rectangle, multiply length x width: 12 x 10 = 120 sq ft


What is the area of a rectangle with a width 12ft and a length of 10ft?

12 x 10 = 120 square feet


What is the area of a rectangle with a width of 12 ft and a length of 10 ft?

A(rect) = w * l = 12ft*10ft = 120ft2Length * width = area10 * 12 = 120


What is 12ft width by 18 ft length converted to square meters?

12 ft * 18 ft = 20.07 metres, approx.


How many square feet in a 12ft by 200ft?

For area measurements, you multiply the length by the width. Here the calculation gives you an answer of 2,400 square feet.


What is the sq yard of 30ft x 12ft?

Multiply width by length to get the area. The answer would be 360 square feet or 40 square yards.


How many yards of concrete for 2ft x 12ft cylinder?

This cylinder will require 1.4 cubic yards of concrete (this assumes a length of 12' and a width of 2').


If the room was 12ft times 8ft how many square feet is the room?

96 square feet. Multiply length by width - the result is the area in square feet.