
Concept explainers
Find the frontal area of the cell phone by excluding the display panel in SI unit and U.S. Customary unit.

Answer to Problem 49P
The frontal area of the cell phone by excluding the display panel in SI unit and U.S. Customary unit is
Explanation of Solution
Given data:
The height of the cell phone
The width of the cell phone
Formula used:
Formula to calculate the frontal area of the cell phone by excluding the display panel is,
Here,
Calculation:
Total frontal area:
Formula to calculate the total frontal area of the cell phone is,
Here,
Substitute
Area of the display panel:
Refer to the figure 7.49, the height and width of the cell phone is divided as slots. Therefore,
For 1 slot, the height is:
For 1 slot, the width is:
From the figure 7.49, approximately the number of slots in height of the display panel is 10, and in width of the display panel is 9.
Substitute the respective slot values in cm for the height and width of the cell phone.
Formula to calculate the area of the display panel is,
Here,
Substitute
Substitute
The SI unit of the frontal area by excluding the display panel is,
The U.S. Customary unit of the frontal area by excluding the display panel is,
Therefore, the frontal area of the cell phone by excluding the display panel in SI unit and U.S. Customary unit is
Conclusion:
Thus, the frontal area of the cell phone by excluding the display panel in SI unit and U.S. Customary unit is
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Chapter 7 Solutions
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