Question 3
A television set has a 30-inch screen size, i.e. the length of the diagonal of the screen is 30 inches. The aspect ratio of the screen is 4 : 3. Find the height of the screen. Leave your answer to the nearest whole number if necessary. (Note: The aspect ratio of the screen refers to the ratio of the width of the screen to its height.)
**Editorial note for this self-study exercise:** Treat the screen as a rectangle. Enter its height in inches, without units.
**Editorial note for this self-study exercise:** Treat the screen as a rectangle. Enter its height in inches, without units.