Question

The length of a rectangle is twice it width. The perimeter of the rectangle is 36cm. Calculate the area of the circle.

Answer 1

72cm^2

Explanation

36=2(y+2y)

36=2(3y)

36=6y

y=6cm

Width of rectangle= 6cm

Length of rectangle= 2y=2×6 = 12

Area of rectangle= L×W = 12×6 =72cm^2

Answer 2

y= width of rectangle
2y= length
2(L+W) = perimeter

36=2(y+2y)
36=2(3y)
36=6y
y=6cm

Width of rectangle= 6cm
Length of rectangle= 2y=2×6 = 12
Area of rectangle= L×W = 12×6 =72cm^2

Answer: 72cm^2