Answer:
The dimensions are length 45 inches and width 20 inches.
Explanation:
Given:
A rectangle has an area of 900 square inches.
The length of the rectangle is 2.25 times the width.
Now, to find the dimensions of rectangle.
Let the width be
.
And the length be
.
So, putting the formula to get the dimensions:
![Area=length* width](https://img.qammunity.org/2020/formulas/mathematics/high-school/6n8m3vhl6suyx2ds8ooj07s2seeyo4xnyf.png)
![900=2.25x* x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mtgyi7zazep79e8xgl7gyxjh96me5r40ek.png)
![900=2.25x^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3ry5i1sysobeqwj9auckpr2hk6hphepy8l.png)
Dividing both sides by 2.25 we get:
![400 =x^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/233qxvnkl9gnz7icgqsp0w1z9vep5k9kp2.png)
Using square root both sides we get:
![20=x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/4y08tj52jgv0foe4cvxfd2ispak1cktrqq.png)
Length = 2.25×20= 45 inches.
Width = 20 inches.
Therefore, the dimensions are length 45 inches and width 20 inches.