You can put this solution on YOUR website! I'm assuming when they say "whole" dimensions, they want integers as the width and length.
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Since 991 is prime, the ONLY dimensions that fit will be:
1 meter (width)
by
991 meters (length)
You can put this solution on YOUR website! What are the whole dimensions of a rectangle with the are of 991 meters
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Do you mean area?
Meters is a unit of length, not area.