Identify the information that is needed to solve the problem.

The length and width of a rectangular garden are 40 m and 20 m. The area is 800 m2. How many meters of fence are needed to go around this garden?

A.
Need to know the area and length of the garden.

B.
Need to know the length and width of the garden.

C.
Need to know the area, length, and width of the garden.

D.
Need to know the area and width of the garden.

Question

Identify the information that is needed to solve the problem.

 

The length and width of a rectangular garden are 40 m and 20 m. The area is 800 m2. How many meters of fence are needed to go around this garden?

 
	
	
 
A.
	Need to know the area and length of the garden.
	
 
B.
	Need to know the length and width of the garden.
	
 
C.
	Need to know the area, length, and width of the garden.
	
 
D.
	Need to know the area and width of the garden.

anonymous · Answer

The perimeter of a rectangle is 2 times the length plus two times the width.  P=2l+2w

You don't see any area variable in the equation of a rectangle. So you don't need to know the area to figure out the perimeter of a rectangle.