Perimeter of rectangle is 10% more than the perimeter of square having side 20 cm. If breathe of perimeter of rectangle is 20 cm find its length.
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Answers
Answer:
The perimeter of a rectangle is 20 cm. If the breadth is 2 cm, what is its area?
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The formula for the area A of a rectangle is: A = lw, where l is the length of the rectangle and w is the breadth or width of the rectangle.
The formula for the perimeter P of a rectangle is: P = 2l + 2w. We're given that P = 20 cm and w = 2 cm. Substituting this information into the perimeter formula, we get:
P = 2l + 2w
20 cm = 2l + 2(2 cm)
20 cm = 2l + 4 cm
20 cm - 4 cm = 2l + 4 cm - 4 cm
16 cm = 2l + 0
16 cm = 2l
(16 cm)/2 = (2l)/2
(16 cm)/2 = (2/2)l
8 cm= (1)l
8 cm = l
Now, substituting l = 8 cm into the area formula in order to find the area of the given rectangle, we get:
A = lw
= (8 cm)(2 cm)
= 16 cm² is the final answer.
Answer:
The formula for the area A of a rectangle is: A = lw, where l is the length of the rectangle and w is the breadth or width of the rectangle.
The formula for the perimeter P of a rectangle is: P = 2l + 2w. We're given that P = 20 cm and w = 2 cm. Substituting this information into the perimeter formula, we get:
P = 2l + 2w
20 cm = 2l + 2(2 cm)
20 cm = 2l + 4 cm
20 cm - 4 cm = 2l + 4 cm - 4 cm
16 cm = 2l + 0
16 cm = 2l
(16 cm)/2 = (2l)/2
(16 cm)/2 = (2/2)l
8 cm= (1)l
8 cm = l
Now, substituting l = 8 cm into the area formula in order to find the area of the given rectangle, we get:
A = lw
= (8 cm)(2 cm)
= 16 cm² is the final answer.