Question

3 The length of a rectangle is twice is breadth
What is the length if perimeter is 90​

Answer 1

Answer:

The length of a rectangle is twice its breadth. If the perimeter of the rectangle is 18 cm, then what is its length?

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Let the breadth of the rectangle is x units

Thus the length of the rectangle = 2x units

We know Perimeter = 2 (length + width)

Perimeter = 2 (2x + x)

Perimeter = 2 (3x)

Perimeter = 6x

6x = 18 cms

6x = 18

x = 18/6

x = 3 cms

Thus the breadth of the rectangle is 3 cms

Length of the rectangle 2x = 2 × 3 = 6 cms

Answer 2

Answer:

let breadth be x and length be 2x

perimeter : 2(l+b) = 90

2(2x+x ) =90

4x + 2x =90

6x =90

x= 90/6 = 15

therefore length = 2x

2 into 15 = 30

Explanation:

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