A minimum of 15 square feet. Just multiply length by width - the answer is the square footage.
20 sq yards. Keep in mind though if you are buying carpet, you will need to factor the width the carpet comes in not the width of your room. Typically that is 12' and 15' rarely 6' and 13'6.
First work out the area of the floor. Area = width * length 13*15= 195. So there are 195 square feet. The carpet costs 2.78 per square foot, so multiply 195 by 2.78. $542.10
The 12 x 20 foot room has an area of 240 square feet, and the 15 x 15 foot room has an area of 225 square feet. That's 465 square feet of carpet. But hold the phone. Carpet is generally sold by the square yard, and a square yard is 9 square feet (as 3 feet x 3 feet is 9 square feet). The 465 square feet of floor is 51.666... or 52 square yards of carpet. It might be necessary to buy some "extra" area depending on the width of the "stock" roll of carpet from which the desired pattern/color of carpet is going to be cut.
The length of a rectangle that has a diagonal of 25 feet and a width of 15 feet is 20 feet.
the formula is L (length) X W (width) = square feet /9 = square yards so in this case 15' X 25' = 375 square feet /9 = 41.67 sq yds ummmmmm...... I thought it was 125, (15 times 25= 375, 375 divided by 3=125
length of diagonal of 20 of a 20 feet and 15 width.
Perimeter = 2*(Length + Width) = 2*(15+9) = 48 feet.
24 ft long. 15 x 24 = 360 square feet 360/9=40 square yards 40 x 20 = 800
25' x 15' = 375 square feet.
225 square feet (15 x 15 = 225).
13' x 15' (195 square feet) = 21.67 square yards of carpet needed.