Question

6. The perimeter of a rectangle is 24 cm and one side is 4 cm. Then, length + breadth​

Answer 1

Answer: 4

so let's see what the formula of perimeter of a rectangle is, yes it's

perimeter = 4 ( l+b)

let's assume that the missing side is the breadth and the given side is length. Now we substitute it

24 = 4 (4 +b ) we will invert it to make it more clear

4 (4 + b) = 24

now we bring the 4 to the right side

4 + b = 24/4  (24/4 is 8)

4 + b = 8

now we bring the 4 to the other side

b = 8 - 4

  = 4

therefore the missing side is 4

Hope this helped you  ^-^

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Answer 2

Answer:

Hope it helps

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Step-by-step explanation:

perimeter

$= 2(l + b)$

:.let 4 be the breadth of rectangle

:.24=2(l+4)

:.

$\frac{24}{2} = (l + 4)$

12=l+4

:.12-4=l

:. length= 8

:. length+breadth=4+8=12