Question

The perimeter of a rectangle is 80 m. Its length is 30 m its breadth is …………​

Answer 1

Answer:

10m

step by step explaination

let breadth be b

perimeter of rectangle= 2(l+b)

=>80=2(30+b)

=> 80/2= 30+b

=> 40=30+b

=> 40-30=b

=> 10=b

Breadth=10m

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Answer 2

Answer:

Breadth of rectangle is $10$ m .

Step-by-step explanation:

To find : breadth of rectangle .

Given : perimeter of a rectangle is 80 m and length is $30$ m .

Solution :

• According to question we are given that perimeter of a rectangle is 80m and length is $30$ m . We have to find breadth of rectangle .
• To find breadth we use following formula -
• Perimeter of rectangle $= 2 ( l + b )$  
• Substituting the values we get,

        $80 = 2 ( 30 + b )\\\\\frac{80}{2} = 30 + b\\\\40 = 30 + b \\\\b = 40 - 30 \\\\b = 10\ m$