Question

The length of rectangle(exceeds) it's breadth by 3cm and it's perimeter is 30cm. Find the length and breadth of rectangle

Answer 1

Answer:

length=x,breadth=x-3

2(x+x-3)=30

2x-3=30/2=15

2x=15+3=18

x=18/2=9

length=9,breadth=x-3=6

Answer 2

Answer:

The length of the rectangle(exceeds) its breadth by 3cm and its perimeter is 30cm, the length, and breadth of the rectangle are 9cm and 6cm respectively

Step-by-step explanation:

• A rectangle is a type of polygon with four sides, which are two lengths and two breadths.

• The area of a rectangle if the length is (l) and breadth is (b)

        $A=l*b$

• The perimeter is the total boundary length $=2(l+b)$

From the question, we have

the perimeter of the rectangle $P=30cm$

let the breadth of the rectangle be $b$

the length of the rectangle $l=b+30$

substitute the values in the perimeter

⇒$P=2(b+b+3 )$

⇒

$30=2(2b+3)\\30=4b+6\\24=4b\\b=24/4=6cm$

therefore the length $l=6+3=9cm$