Question

The length of rectangle is twice its breadth if the perimeter is 90 meters find the length and breadth of the rectangle​

Answer 1

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Let the breadth of the rectangle is b cm.

So, the length of the rectangle is 2b cm.

We know that the perimeter of rectangle is

=2(l+b)

Since, perimeter of rectangle is 90 cm.

Therefore,

6b=90

b=15 cm

And L = 30 cm

Answer 2

Let the Breadth be x

Length be 2x

Perimeter = 2(l+b)

→ 90 = 2(x + 2x)

→ 90 = 2(3x)

→ 90 = 6x

→ x = 90/6

→ x = 15

So, now subsituting

Breadth = x = 15

Length = 2x = 2x = 2 × 15 = 30

So, the Breadth is 15 m & the length is 30 m