Question

please tell me this I don't know how to do it please tell fast​

Answer 1

Question:

The sides of a rectangle are ‘3x + y’ and ‘7x + 2y’.Find it's perimeter.

Answer:

• 20x + 6y units

Explanation :

Given dimensions of the rectangle :

• length = 3x + y
• breadth = 7x + 2y

Perimeter of a rectangle is given by :

→ 2(l + b)

Where,

• l is length
• b is breadth

So, the perimeter of the rectangle will be :

→ 2{(3x + y) + (7x + 2y)}

→ 2{3x + y + 7x + 2y}

→ 2{10x + 3y}

→ 20x + 6y units.

∴ The perimeter of the rectangle is 20x + 6y units.

Answer 2

Question:

The sides of a rectangle are ‘3x + y’ and ‘7x + 2y’.Find it's perimeter.

☆Note- Refer to attachment"

Solution :

20x + 6y units

Explanation :

Given dimensions of the rectangle :

●length = 3x + y

●breadth = 7x + 2y

Perimeter of a rectangle is given by :

→ 2(l + b)

Where,

l is length

b is breadth

So, the perimeter of the rectangle will be :

→ 2{(3x + y) + (7x + 2y)}

→ 2{3x + y + 7x + 2y}

→ 2{10x + 3y}

→ 20x + 6y units.

∴ The perimeter of the rectangle is 20x + 6y units.

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