The area of a rectangle is 243 cm2 The length is three times greater than the width What are the dimensions?

Let the length be 3x and the width be x:

3x*x = 243

3x2 = 243

Divide both sides by 3:

x2 = 81

Square root both sides:

x = 9

Therefore: length = 27 cm and width = 9 cm