Concept explainers
To determine the dimensions of the scarf.
Answer to Problem 73E
Length=60.835inches
Breadth=
Explanation of Solution
Given:
Old length=60inches
Old breadth=4inches
Total yarn to knit 396 square inches scarf.
Calculation:
According to question:
Increase in length is 3 times increase in width.
Let the increase in length is
Therefore the equation for area of scarf becomes:
Opening brackets,
So,
Converting the given equation in standard form i.e.
So,
On comparing the equation with
Finding the value of
Substituting the values,
Opening brackets,
So,
Therefore,
So,
So,
Increase can never be negative
Therefore,
So,
Length=
Breadth=
Chapter 9 Solutions
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