Question

the length and breadth of a rectangle are 10 centimetre and 8 centimetre find its perimeter if the length and breadth doubled​

Answer 1

when doubled the length and breadth

length l= 20cm

breadth b= 16 cm

perimeter=2(l+b)= 2×36= 72cm

Answer 2

Answer :

›»› The perimeter of a rectangle are 72 cm.

Given :

• The length and breadth of a rectangle are 10 centimetre and 8 centimetre.
• The length and breadth doubled.

To Find :

• The perimeter of a rectangle = ?

Solution :

The length and breadth are doubled :

→ Length = 10 * 2

→ Length = 20 cm

→ Breadth = 8 * 2

→ Breadth = 16 cm

As we know that

→ Perimeter = 2(length + breadth)

Let, us assume that the length be "l" and the breadth be "b"

→ Perimeter = 2(l + b)

→ Perimeter = 2(20 + 16)

→ Perimeter = 2 * 36

→ Perimeter = 72

║Hence the perimeter of the rectangle are 72 cm.║

Extra Brainly Knowledge :

• Area of Rectangle = length * breadth.
• Perimeter of Rectangle = 2(l + b).
• Diagonal of Rectangle = √(l)² + (b)².
• Area of Square = (Side)².
• Perimeter of Square = 4 * Side.
• Diagonal of Square = √2a.