Answer:
width = 30
Step-by-step explanation:
We know that the formula for finding the perimeter if a rectangle is:
Perimeter of a rectangle = 2 (l + w)
We are given the value of the perimeter and the length so we can find the width of the rectangle by putting in the given values.
Perimeter of rectangle = 2l +2w
90 = 2(15) + 2w
90 = 30 + 2w
90 - 30 = 2w
w = 60 / 2
w = 30
Therefore, the width of the rectangle, with length 15 and perimeter 90, is 30.
