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It depends on the shape of your room.

If your room is a rectangle then your perimeter is 102 feet.

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Q: What is the perimeter of a room 21 by 30 feet?
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Related questions

What is the perimeter of a room of 30 by 40 feet?

The definition of 'perimeter' is the sum of the distances around a given two-dimensional object. Assuming that we are referring to a rectangular room (or at least a 4-sided room with 2 sets of parallel sides), then the answer is simply 2(30 + 40) = 140 feet.


What is the perimeter of a rectangle with a length of 11 feet and width of 4 feet?

The perimeter is 30 feet for this rectangle.


How much space will be covered by paint if you paint the walls of a room that is 30 feet long and 25 feet wide And 8 feet high?

Perimeter = 2*(L +W) = 2*(30 + 25) = 2*55 = 110 feet Painted surface = Perimeter*Height = 110*8 = 880 sq feet


If the perimeter of the deck is 30 feet and the length of the deck is 10 feet what is the width of the deck?

It is 5 feet because 2*(10+5) = 30 feet which is the perimeter


How many square feet is a room 30 feet long 14 feet wide 9 feet high?

To find the total square footage of the room, you first find the area of the walls by multiplying the perimeter of the room by its height. The perimeter is (2 x length) + (2 x width), then multiply by height. In this case, (2 x 30 + 2 x 14) x 9 = 828 square feet.


If a circle has a diameter of 30 feet how many feet is the total perimeter?

30 * pi ≈ 94


What is the width of a rectangle if the perimeter is 100 feet and length is 30 feet?

20 feet


What is the perimeter of 9 feet long and 6 feet wide?

Well, if you're talking about a square, then the perimeter is twice the length plus twice the width; in this case it would be 30 feet...


What is the width of a rectangle if the perimeter is 100 feet and the length is 30 feet?

20


What is the perimeter of a 25 foot wide by 30 foot long classroom?

Type your answer here... Perimeter = 25+25+30+30 = 110 feet


The formula for the perimeter of a rectangle is P = 2W + 2L.What is the length of a rectangle if the perimeter is 100 feet and the width is 20 feet?

30


Do rectangles with the same area of 30 feet have the same perimeter?

They can, but not necessarily. Let's say we have a rectangle of 5x6 and another of 1x30. The areas of both are 30 square feet, but their perimeters are different. Perimeter of 5x6: 5+5+6+6=22 feet Perimeter of 1x30: 1+1+30+30=62 feet There are many more examples of this.