Question

The length and breadth of rectangle is in the ratio of 4:3. if the perimeter of rectangle is 2100 cm then find its area?​

Answer 1

Answer:

$2,70,000^2cm$

Step-by-step explanation:

Given:

Perimeter of rectangle = 2100 cm.

Ratio between length and width of the rectangle = 4:3.

So, let the length and breadth of rectangle = 4x and 3x respectively.

perimeter = 2(l + b)

So, putting above value in equation of perimeter

perimeter=2(4x+3x)

perimeter=2(7x)

2100 = 14x

x = 150

​So, length and width of rectangle will be 600 cm and 450 cm.

So, area of rectangle will be,

Area = lb

Area = 600 × 450 = $2,70,000^2cm$

Answer 2

Step-by-step explanation:

Let length=l, breadth=b of rectangle

⇒ Perimeter=2(l+b)

⇒100=2(35+b)

⇒50=35+b

⇒b=15cm

Area=lb=35×15=525cm

2

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