I believe your answer is as follows:
9 / (30 x 66 x 1.6)
352 yards of sand.
9 yards x 27 yards = 243 square yards.
191.54 square yards.
Enough to cover whatever the size of your lawn is.
15 x 10 = 150 square yards
20 square yards are needed
2 and 2/3 yards.
At least 31.77 square yards are needed.
9 yards x 27 yards = 243 square yards.
You will need at least 32 square yards of carpet to cover that area.
13.333 square yards.
191.54 square yards.
Enough to cover whatever the size of your lawn is.
15 x 10 = 150 square yards
At least 622.2 square yards of sod are needed to cover that area.
170/9 = 18.9 square yards
9ft by 9ft is the same as 3 yards by 3 yards so the answer is 9 square yards.
90