30
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30m2
They can, but not necessarily. Let's say we have a rectangle of 5x6 and another of 1x30. The areas of both are 30 square feet, but their perimeters are different. Perimeter of 5x6: 5+5+6+6=22 feet Perimeter of 1x30: 1+1+30+30=62 feet There are many more examples of this.
5 x 6 = 30 cm2
each tile is 1 sq ft and room is 6x5=30 sq ft so you need 30tiles
5x6=30