Question

12. The perimeter of a rectangle is 42 cm and its length is double its breadth. Find the length
and breadth of the rectangle.
shorts
13. The short​

Answer 1

Answer:

let its breadth= x

let its length = 2x

perimeter= 2 (L+b)

given perimeter= 42 cm

therefore,

2 ( x + 2x ) = 42 cm

2 (3x) = 42 cm

6x = 42

$x \: = \frac{42}{6}$

x = 7

now,

breadth = x = 7cm

length = 2x = 2 × 7 = 14 cm

Answer

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Answer 2

Answer:

let its breadth= x

let its length = 2x

perimeter= 2 (L+b)

given perimeter= 42 cm

therefore,

2 ( x + 2x ) = 42 cm

2 (3x) = 42 cm

6x = 42

x \: = \frac{42}{6}x=642

x = 7

now,

breadth = x = 7cm

length = 2x = 2 × 7 = 14 cm