Question

Perimeter of a rectangle is 40 cm if the breadth is 9 cm .find the length of rectangle

Answer 1

Given :

• Perimeter of rectangle = 40 cm
• Breadth = 9 cm

To find :

• Length of rectangle

According to the question,

We know,

• Perimeter of rectangle = 2(l + b)

Where,

• l = length
• b = breadth

So,

➝ Perimeter = 2(l + b)

➝ 40 = 2(l + 9)

➝ 40 = 2l + 18

➝ 40 - 18 = 2l

➝ 22 = 2l

➝ 22 ÷ 2 = l

➝ 11 = l

• So, the length of rectangle is 11 cm.

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★ Verification :-

We know that,

• Perimeter = 40 cm

So, according to the formula

➝ Perimeter = 2(l + b)

➝ Perimeter = 2(11 + 9)

➝ Perimeter = 2(20)

➝ Perimeter = 40 cm

Hence, verified.

Answer 2

Answer:

40/2-9

20-9

11

Step-by-step explanation:

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