Wall posters are usually sold curled up in cylindrical cardboard tubes.If the length of the tube is 84.5 cm,and the inside diameter of the tube is 2.40 cm,what is the area of the poster expressed to the correct number of significant figures? (Assume the poster is just as long as the tube and does not overlap itself. ) A)202.8 cm² B)637.1 cm² C)203 cm² D)319 cm² E)637 cm²

Question

Quizplus · Accepted Answer

The area of the poster is calculated as the product of its length and width. The length is 84.5 cm, and the width is the circumference of the tube, which is π times the diameter (2.40 cm). Therefore, the area is 84.5 cm * π * 2.40 cm = 637.1 cm², rounded to three significant figures as 637 cm².

Wall Posters Are Usually Sold Curled Up in Cylindrical Cardboard