Question

The length of a rectangle is twice its width.
The perimeter of the rectangle is 126 feet.
Find the length.

Answer 1

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Length of a rectangle is twice it's breadth . And perimeter is 126ft.

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Length and breadth of a rectangle

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$Let \: the \: breadth \: of \: rectangle = x \\ Then, \: length \: of \: rectangle \: = 2x \\ Perimeter \: of \: rectangle \: = 126 \\Also, \: perimeter \: of \: rectangle \: = 2(l + b) \\ 126 = 2(x + 2x) \\ 126 = 2(3x) \\ 126 = 6x \\ x = \frac{126}{6} \\ x = 21$

Therefore, Length = 2x = 2(21) = 42ft

Breadth = x =21ft

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Answer 2

Answer:

breadth =21

and length=42