Question

The perineter of a renctsngle is54m.lfits lengh is 15m.Find iys breadth

Answer 1

Answer:

The breadth is 12m.

Step-by-step explanation:

Given Length (l) = 15 m

Let the breadth be b.

Then, perimeter of rectangle = 2(l+b) = 2(15+b) = 30 +2b

But, given perimeter = 54 m

Thus, According to the question,

30 + 2b = 54

Or, 2b = 54 - 30 = 24

Or, b = 24/2 = 12m

Hence, the breadth is 12m.

Answer 2

Given :-  

The perimeter of rectangle = 54 m

The length of the rectangle = 15 m

 

To be found :-

The breadth of the rectangle

We know that,

perimeter of rectangle = 2(l+b) units

[ ∴ In which l is the length and b is the breadth of the rectangle ]

⇒ 54 = 2(l+b)

⇒ 54 =2(15 + b)   [ ∵ length = 15 m (given) ]

 

⇒ 54 ÷ 2 = 15 + b   [ transporting 2 to LHS ]

 

⇒ 27 = 15 + b  

 

⇒ 27 - 15 = b   [ transporting 15 to LHS ]

 

⇒ 12 = b

 

Therefore

the breadth of the rectangle is 12 m.