Question

The perimeter of rectangle is 120 cm. If the length is 45 cm. find its breadth and area.​

Answer 1

Answer:

L00K BEL0W

Step-by-step explanation:

Let the sides of our rectangle be “a” and “b”.

The perimeter of a triangle = sum of the lengths of its side = 2a + 2b.

Area of a rectangle = length * breadth = ab.

Perimeter = 2a + 2b = 44.

a + b = 22.

Area = ab = 120.

(a - b)^2 = (a + b)^2 - 4ab

calculate the value of a - b,

we can figure out the value of “a” and “b”.

(a - b)^2 = (22)^2 - 4*120

= 484 - 480

= 4.

Which implies that,

a - b = 2

 

And we had found out before that,

a + b = 22, through our perimeter.

If we solve these two equations, we get,

a = 12, b = 10

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yes, this is it and until next time take care

Thank youuu! :)

Answer 2

$\underline\red{\bold{Answer :- 15cm}}$.

Step-by-step explanation:

$\LARGE\textsf{Given:-}$

The perimeter of a rectangular sheet =120 cm

length =45 cm

Therefore,

$\textsf{2(length+breadth)=120}$

(45+breadth)=60

breadth=15 cm

$\textsf{Formula for the Area of rectangle-}$

$\LARGE A=wl$

A = 45 * 15 = 675

$\LARGE\textsf{More information :-}$

• Perimeter of a Rectangle- Rectangles are four-sided polygons. Following are the properties of a rectangle:
• (i) All the angles of a rectangle are 90º.
• (ii) Opposite sides of a rectangle are always the same in size.

$\textsf{Formula for the perimeter of rectangle-}$

• 2 × (sum of adjacent sides)