Answer:
2.5 feet
Explanation:
According to the problem, computation of given data are as follows,
Length = 24 inches = 2 feet ( 1 feet = 12 inches)
Width = 18 inches = 1.5 feet ( 1 feet = 12 inches)
So, we can calculate the diagonal length by using Pythagorean Theorem.
![L^(2) + W^(2) = D^(2)](https://img.qammunity.org/2022/formulas/mathematics/high-school/4py2ju85n8ee6vk74gv1nc24bq9qzzx5r6.png)
Where, L is length, W is width, and D is diagonal length
So, by putting the value, we get
![2^(2) + 1.5^(2) = D^(2)](https://img.qammunity.org/2022/formulas/mathematics/high-school/hn48rgzjwmcz1qfysaerq5z7rgwujdyvol.png)
![D^(2) = 4 + 2.25](https://img.qammunity.org/2022/formulas/mathematics/high-school/cwgetlzxw3v28sugh4ndtakrjy5ziutlgn.png)
![D = √(6.25)](https://img.qammunity.org/2022/formulas/mathematics/high-school/8wcg0bdmwhzgt8mx43hbfcrdeg4kmq0f72.png)
D = 2.5 feet
Hence, diagonal length is 2.5 feet.