The width of the desk is 1.5 ft.
SOLUTION:
Given that, the top surface of a desk has a length of 5.6 ft. And the length is 4 times of its width.
We have to find the width of the desk .
(In this sum we have been given one of the two values and the ratio between both the values, so we can easily find the other unknown value by simple division)
Now, we know that, the length is 4 times of its width
![\begin{array}{l}{\rightarrow \text { Length of the desk }=4* \text { width of the desk }} \\\\ {\rightarrow \text { Width }=\frac{\text { length }}{4}} \\\\ {\rightarrow \text { Width }=(5.6)/(4)} \\\\ {\rightarrow \text { Width }=1.4}\end{array}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ndhezoebcynjamoj5r6d2ula86o7jo6ljo.png)
Hence, the width of the desk is 1.5 ft.