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Q.

A rectangle has a perimeter 72m. If its length is thrice of its breadth. Find breadth.


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a

9m

b

8m

c

5m

d

1m 

answer is A.

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Detailed Solution

Concept- - Due to the equality of the opposing sides of the rectangle, the method for finding the perimeter of a rectangle simply involves adding the total of all its sides. Simply enter the length value into the perimeter calculation, and you may use the resulting linear equation to compute the breadth.
Since there is only one equation and only two variables—length and breadth—that need to be determined, we must first determine the perimeter of the rectangle before calculating the value of length, or in this case, the value of length in terms of width, which is,
Question ImageLet the rectangle's length be Question Image, its width be Question Image, and its perimeter be Question Image.

Question Image
Hence, the correct option is 1) 9m.
 
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