There are 36 inches in a yard (12 inches per foot times 3 feet per yard), so a square yard is 36 times 36 or 1,296 square inches. So 1,600 square inches is greater.
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90 square inches is 0.0694 square yard.
The area would be 81 square inches.
By unit of length and distance and conversion ,we can say that 1 yard=36 inches 2 yard =108 inches 108 inches is equal to 1 yard .
The area of a rectangle 12 inches by 12 yards is 5184 square inches, since 12 inches * 12 yards * 36 inches/yard = 5184 square inches.
One yard will cover 81 square feet 4 inches thick, So 81x40=3,240 square feet if spread 4 inches thick. 36/4=9, 9x3x3=81, 81x40=3,240 If you want it 6 inches thick 36/6=6, 6x3x3=54, So one yard will cover 54 square feet 6 inches thick, And 54x40=2,160 square feet If spread 6 inches thick! Now this is spreading it on thick/DEEP!