Question

The length of a rectangular field is twice its breadth. If the perimeter of the field be 56 cm. find the dimensions and Area of the rectangle.

Answer 1

Answer:

l = 18.66 cm , b = 9.33 cm

Area = 174.22 cm^2

Step-by-step explanation:

Let, breadth = x

So, length = 2x

From the question :-

P = 2 (l+b)

=>56 = 2(2x+x)

=>56/2 = 3x

=> 28 = 3x

=>x = 28/3

= 9.33

So, b = 28/ 3 = 9.33 cm

l = 2x = 2×28/3=56/3 = 18.66 cm

Hence, Area = lb

= 56/3 × 28/3

= 1568/9 = 174.22 cm^2

Answer 2

Answer:

Let, breadth = x

So, length = 2x

From the question :-

P = 2 (l+b)

=>56 = 2(2x+x)

=>56/2 = 3x

=> 28 = 3x

=>x = 28/3

= 9.33

So, b = 28/ 3 = 9.33 cm

l = 2x = 2×28/3=56/3 = 18.66 cm

Hence, Area = lb

= 56/3 × 28/3

= 1568/9 = 174.22 cm^2

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