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Sagot :
Answer:
48
Step-by-step explanation:
21 white tiles = 63 cm2
total number is 144
144-63 = 81
81/3 = 27
so 27 black tiles
21+27 = 48 total.
The answer is 27 tiles !
21 white tiles × 3 = the total area it takes up!
21 × 3 = 63
144 - 63 = 81
81 is the area left!
Divide by 3 to find how many black tiles are needed!
81÷ 3 = 27
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