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zzz [600]
3 years ago
12

The question is on the image.​

Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
7 0

Hi there!

\huge\boxed{\text{22 cm}}

We know that:

Area of a rectangle = l × w

The areas are the same, so:

3x · 4 = 6(3x - 2.5)

Simplify:

12x = 18x - 15

Solve for x:

15 = 6x

x = 2.5

Plug in this value of x to find the perimeter of rectangle B:

P = 2l + 2w

l = 6

w = 3(2.5) - 2.5 = 5

P = 2(6) + 2(5) = 22 cm

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