Question

the length of a rectangular park istwice its breadth.. if the perimeter is 120 metre find the length and breadth of the park. ​

Answer 1

Answer:

Solution

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Let the breadth of the rectangle is b cm.

So, the length of the rectangle is 2b cm.

We know that the perimeter of rectangle is

=2(l+b)

Since, perimeter of rectangle is 120 cm.

Therefore,

6b=120

b=20 cm

And l=40 cm

So, the area of rectangle is

=20×40=800 cm2

Hence, the length is 40 cm, breadth is 20 cm and area is 800 cm2.

Answer 2

Explanation

Let the breadth be x

Then the length will 2x (length is 2 times breadth)

Perimeter of rectangle = 2(length + breadth)

120 m = 2(2x + x)

120 m = 2 × 3b

120 m = 6b

x = 120 m ÷ 6

x = 20 m

Final answer

Breadth = x = 20 m

Length = 2x = 2 × 20 m

Length = 40 m

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