To determine the width of the border.
Answer to Problem 55E
The width of the border,
Explanation of Solution
Given:
Area to cover with patio bricks=140 square feet.
Calculation:
According to question,
Area to cover with patio bricks=140 square feet.
Formula for, area to cover with patio bricks= area of outer square- area of inner square
For outer square,
Length=20ft
Breadth=16ft
For inner square,
Length=20
Breadth=16
Therefore, area to cover with patio bricks=
On solving brackets,
So,
Opening brackets,
Taking all the terms on one side,
Finding the value of
On comparing the equation with
Substituting the values,
Opening brackets,
So,
Solving root,
Therefore,
So,
and
Length can never be negative,
Therefore,
Chapter 9 Solutions
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