The length of a rectangle is twice its breadth. If the perimeter is 42cm, find:

Question

1) the length

2) the breath

Answer 1

P = 2L + 2W

42 = 2(2W) + 2W

42 = 6W

7 = W

Answer 2

Let the breadth of rectangle be xm
Length _ 2xm
Perimeter_2 (length + breadth)
Perimeter_ 2 (x+2x)
_ 6x _42m
_3x _21m
On solving we get
x_7m
Breadth_ 7m
Length_ 14m
Area _ length x breadth
_ 14 x 7
Area_ 98 m²

Answer 3

bakwas

Answer 4

first one good