Final answer:
To cover all 348 tiles, you would need to buy 18 bottles of paint.
Step-by-step explanation:
To calculate how many bottles of paint are needed to cover 348 tiles, divide the total number of tiles by the number of tiles that one bottle can cover. Step 1: Divide 348 by 20 to find the number of bottles needed. Step 2: 348 / 20 = 17.4. Step 3: Since you can't have a fraction of a bottle, round up to the nearest whole number. Therefore, you would need to buy 18 bottles of paint to cover all 348 tiles.
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