Answer:
Step-by-step explanation:
Area of a reactangle = Length * Width
A = LW
If the length of a rectangle is twice the width, then L = 2W
Substituting L = 2W into the formula for calculating the area
A = 2W(W)
A = 2W²
Given the area of the rectangle to be 90 square units, then;
90 = 2W²
2W² = 90
divide both sides by 2
2W²/2 = 90/2
W² = 45
W = √45
To get the length of the rectangle, we will substitute, W = √45 into L = 2W
L =2√45
L = 2√9*5
L = 2(3)√5
L = 6√5 units
Hence the irrational number that represents the length is 6√5 units.