SOLUTION: The length of a rectangular tile is twice its width, and its perimeter is 21cm. Find the length and the width of the tile.
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Question 832657: The length of a rectangular tile is twice its width, and its perimeter is 21cm. Find the length and the width of the tile. Answer by JulietG(1812) (Show Source):
You can put this solution on YOUR website! A perimeter is a fence. You need 2 pieces of length + 2 pieces of width. P = 2L + 2W
You're given the following information:
P = 21
L = 2W
Enter that information into the equation:
P = 2L + 2W
21 = 2(2W) + 2W
Multiply
21 = 4W + 2W
21 = 6W
Divide each side by 6
3.5 = W
.
If W is 3.5, then L is twice that or 7 <<--
