Question

the perimeter of a rectangle is 40 metre and its breadth is 800 cm find its length .​

Answer 1

Given :

• Perimeter of rectangle = 40 m
• Breadth of rectangle = 800 cm

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To Find :

• Length of the rectangle

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Solution :

Firstly we have to change unit of perimeter in cm

→ 1 m = 100 cm

→ 40 m = 40 × 100 = 4000 cm

★ Perimeter of rectangle = 2 ( L + B )

⇒ 4000 = 2 ( L + 800 )

⇒ 4000/2 = L + 800

⇒ 2000 = L + 800

⇒ L = 2000 - 800

⇒ L = 1200 cm

∴ Length of rectangle = 1200 cm or 12 m