SOLUTION: How do you solve: The area of a rectangle varies jointly with its length and width. If both the length and width are tripled, by what factor is the area multiplied? Thank you

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Question 299864: How do you solve:
The area of a rectangle varies jointly with its length and width. If both the length and width are tripled, by what factor is the area multiplied?
Thank you!

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
+A1=L%2AW+
A2=%283L%2A3W%29=%283%2A3%29%28L%2AW%29=9%2AA1
The area increases 9 times as much.