Question

the length of a rectangle is twice its breadth its perimeter is 30 cm what is the length of the rectangle​

Answer 1

Answer:

10 cm

Step-by-step explanation:

breadth =x

length=2x

perimeter= 2(l+b)

=2(x+2x)

=2(3x)

30=2(3x)

15=3x

5=x

breadth=5

length=2×5

=10

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Answer 2

Answer:

here is your answer

Step-by-step explanation:

let length be 'l'

and breath be ' b'

according to the question

$l = 2b \\ perimeter \: is \: 30 \\ 2{l + b} = 30 \\ 2(2b + b) = 30 \\ 2(3b) = 30 \\ 3b = \frac{30}{2} \\ 3b = 15 \\ b = 5$

hence breath is 5cm

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