SOLUTION: A rectangle is twice as long as it is wide. If its area is 50 sq. yd., find the length.

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Question 881781: A rectangle is twice as long as it is wide. If its area is 50 sq. yd., find the length.
Found 2 solutions by JulietG, ewatrrr:
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
L * W = Area
L = 2W
Substitute the value of L from the second equation into the first.
2W * W = 50
2W^2 = 50
Divide each side by 2
w^2 = 25
Take the square root of each side
w = 5
.
If the width is 5, then the length is twice that, or 10. 10*5=50
Success!

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

     .

A = Lw

(2w)w = 50 yd^2

2w^2 = 50

 w^2 = 25  (Tossing out the negative solution for unit measure)

  w = 5yd  and L = 10yd