Math, asked by uniquefantassy, 2 months ago

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

Answered by pranay00000
1

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.

Answered by MsAainaDz
0

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.

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