Mrs. Hernanadez is covering the top of a kitchen shelf that is 26 inches long and 15 inches wide. She incorrectly measures the length to be 25 inches long. How will this error affect her calculations?

Question

anonymous · Answer

@Nurali please help

anonymous · Answer

@whpalmer4

anonymous · Answer

the area that she calculates will be incorrect.

whpalmer4 · Answer

The area she is to cover is 26 inches long, but she measures it as being only 25 inches.  that means her area measurement will be too small.  The true area is 26*15 = 390 square inches, but her calculation gives only 375 square inches.  This is an error of approximately (390-375)/390 = 3.8%