Question

Read the question in the picture .

Answer 1

$length \: \: of \: \: rectangle \: =x + 4 \\ width \: \: of \: \: rectangle \: = 5 - x \\ perimeter \: of \: rectangle = 2(l + b) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:= 2(x + 4 + 5 - x) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2(9) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: =18$

THEREFORE THE PERIMETER OF RECTANGLE IS 18

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Answer 2

Answer:

1st option

18

Note:

★ The perimeter of the rectangle is given as ;

P = 2×(L + B) , where L is the length and B is the breadth of the rectangle .

Solution:

• Given : L = x + 4 , B = 5 - x
• To find : Perimeter = ?

Here,

Length of the rectangle is ;

L = x + 4

And ,

Breadth ( width ) of the rectangle is ;

B = 5 - x

Thus,

The perimeter of the rectangle will be ;

=> P = 2×(L + B)

=> P = 2×(x + 4 + 5 - x)

=> P = 2×9

=> P = 18

Hence,

Perimeter = 18