Question

The perimeter of a rectangular frame is 28 cm. if the length and breadth of the frame are in the ratio 2: 5 , find the area of the frame .
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Answer 1

Answer:

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Step-by-step explanation:

Let the length and breadth = 2x and 5x

Perimeter of a rectangle :- 2(l + b) i.e, 2(2x + 5x)

$28 = 2(7x)$

$x = 2$

So, length = 10cm and breadth = 4cm

The area of the rectangle is (10×4)cm = 40cm^2.

Answer 2

Step-by-step explanation:

let the length and breath be x

2x:5x

we know that.,

perimeter =sum of all sides

28=(2x+5x)2

28=(7x)2

x=28/14

x=2cm

length =2*2=4

breadth = 5*2=10

now,

area=l*b

area=10*4

area=40cm²

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