A. 280
B. 200
C. 288
D. 2880
🧠 Explanation:
To cover a floor of 5 ft × 4 ft with 10 in² tiles, 288 tiles are needed. “Required” is a past participle verb; “tiles” is a noun. Calculation involves area conversion: 5 ft × 4 ft = 2400 in² ÷ 10 in² per tile = 240 tiles (check original rounding). Understanding units, measurement, and arithmetic is key in mathematics and construction.