Answer:
The length of the poster is 36 centimeter.
Explanation:
Given : A rectangular poster has an area of 504 square centimeters the width is 14 centimeters.
To find : How long is the poster ?
Solution :
The area of the rectangle is given by,

The area of the rectangle is 504 square centimeters.
The width of the rectangle is 14 centimeter.
Substitute the value in the formula,



Therefore, The length of the poster is 36 centimeter.