Question

if the length of a rectangle is twice its breadth and its perimeter is 120 metre than its length is​

Answer 1

Step-by-step explanation:

Let breadth of a rectangle = x

Then length = 2x

Perimeter = 2(x+2x)=2×3x=6x

6x=120

⟹x=20

Length =2x=20×2=40m

Answer 2

Given:

• The perimeter of the rectangle 120 m.
• The length of the rectangle is twice it's breadth.

Need to find:

• The length of the rectangle ?

Solution:

Let the breadth of the rectangle be "x".

And, it's length be "2x".

As we know that,

⋆ Perimeter = 2 × (length + breadth)

Putting the values:

➜ 2 × (x + 2x) = 120

➜ (x + 2x) = 120/2

➜ (x + 2x) = 60

➜ 3x = 60

➜ x = 60/3

➜ x = 20

Hence,

• The breadth of the rectangle is 20 m.
• The length of the rectangle is (20 × 2) 40m.

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