SOLUTION: The perimeter of a rectanglar pool is 140 yards. If the length is 10 yadrs more than the width, find the dimentions of the pool.

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Question 80622: The perimeter of a rectanglar pool is 140 yards. If the length is 10 yadrs more than the width, find the dimentions of the pool.
Answer by tutor_paul(490) About Me  (Show Source):
You can put this solution on YOUR website!
In this problem, you have 2 equations with 2 unknowns. That means you can solve for the unknowns:
Since you are given the perimeter, you can derive your first equation from that:
Equation #1: P=2L%2B2W=140
You are also given the fact that the length is 10 yards more than the width. This forms the basis of your second equation:
Equation #2: L=W%2B10
Now that you have established the 2 equations, you are ready to go. First, plug in your expression for L from Equation #2 into Equation #1 and solve for W:
2%28W%2B10%29%2B2W=140
2W%2B20%2B2W=140
4W=120
highlight%28W=30%29
Now, you can plug this value of W into Equation #2 and get L:
L=30%2B10
highlight%28L=40%29
Good Luck,
tutor_paul@yahoo.com