Question 863007
L = 3W [The length of a rectangle is three times its width. ]
L * W = 300 (Area = length * width)
Substitute the known value of L into the equation.
(3w) * w = 300
3w^2 = 300
Divide each side by 3
w^2 = 100
Take the square root of each side
w = 10
.
Let's check the answer.
If the width is 10, then the length is 3x that, or 30.
30 * 10 = 300
Success!