Question 12
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.)
A. 13 inches
B. 18 inches
C. 21 inches
D. 24 inches
E. None of the above
**Editorial note for this self-study exercise:** The screen is rectangular. Enter its height in inches without units, not an option letter.
A. 13 inches
B. 18 inches
C. 21 inches
D. 24 inches
E. None of the above
**Editorial note for this self-study exercise:** The screen is rectangular. Enter its height in inches without units, not an option letter.