It depends on the units used for measuring the tiles: 17x17 inches, centimetres etc. As you have not specified this we can not answer your question.
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350.
350 !
To determine how many 19.5x19.5 inch tiles are needed to cover 350 square feet, first convert the tile dimensions to square feet. Each tile is approximately 2.7 square feet (19.5 inches = 1.625 feet, so 1.625 x 1.625 = 2.640625 sq ft). Divide 350 sq ft by 2.640625 sq ft per tile, which equals about 132.5 tiles. Therefore, you would need 133 tiles to cover the area, accounting for any cuts or waste.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
It would depend on the precise layout of the room, and how well you can cut tiles if the room isn't some precise multiple of 1.5 feet. In general, a tile that is 18 inches square covers 1.5*1.5=2.25 square feet. Disregarding tile fragments, 350 / 2.25 = 155.5555 tiles.
350.
350 !
To determine how many 19.5x19.5 inch tiles are needed to cover 350 square feet, first convert the tile dimensions to square feet. Each tile is approximately 2.7 square feet (19.5 inches = 1.625 feet, so 1.625 x 1.625 = 2.640625 sq ft). Divide 350 sq ft by 2.640625 sq ft per tile, which equals about 132.5 tiles. Therefore, you would need 133 tiles to cover the area, accounting for any cuts or waste.
If it's really square you should need 156 18" tiles to cover 350 square feet. Most tile stores let you return unused tiles, so I suggest you get a few extra. The number needed can change based on the grout space, how many you break and if the area isn't square you may need more. A rule of thumb is to add 10% for waste. That rule would say to buy about 175.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
It would depend on the precise layout of the room, and how well you can cut tiles if the room isn't some precise multiple of 1.5 feet. In general, a tile that is 18 inches square covers 1.5*1.5=2.25 square feet. Disregarding tile fragments, 350 / 2.25 = 155.5555 tiles.
It depends on the units used for 18 by 18. For example, two tiles of 18 ft x 18 ft will be enough. On the other hand, you will need just over 1000 tiles measuring 18 cm x 18 cm.
how much torque for a Chevy Z71 350 vortec engine valve cover
That is 87.5 pounds
350
16X 16 tiles are 256 sq inches each144 sq inches in a sq footdivide the 256 by 144 and you get 1.778 sq foot per tiledivide 350 sq feet by 1.778 and you will know how many tiles196.875 is the exact calculation, if this is HomeworkIf this is a real flooring exercise, there is the grout line and the fact that 16X16 tiles are not fully 16X16 so you have to allow a few extra for trim & finish.
2800 feet of gravel