Lola' rectangular piece of cardboard

Question

Lola has a rectangular piece of cardboard. The length of the cardboard is 14 inches. The width of the cardboard is half of its length. Lola cuts the cardboard into 9 rectangular strips having the same width. The length of each strip is 14 inches. Lola measures the width of each strip and rounds her answer to the nearest hundredths as 1.29 inches

 

Explain whether Lola was accurate or inaccurate in her measurement. Use calculations to support your answer

Answer 1

We are given that a piece of cardboard is 14 inches long, and its width is ½ the length, or 7 inches.

 

Lola cut the cardboard into 9 strips, each of which was 14 inches long.

 

She then measured the width of each strip, and determined that the width of each strip was 1.29 inches.

 

That measurement was incorrect, because the initial width of the cardboard was 7 inches, so 9 strips (if they were cut evenly) would have a width of 7 inches divided by 9, or 0.77 inches each.

 

Lola was inaccurate in her measurements.