A piece of fan-shaped floor has a radius of 3 meters and a central angle of 10 degrees. If it costs 100 yuan per square meter, how much does it cost?
3.14 * 3 * 3 / 36 = 0.785 0.785 * 100 = 78.5 yuan
The area of Xiaoxiaojia's kitchen is 6 square meters, and 12 fast floor tiles are used. The area of each floor tile is;
Test IQ question, not test intelligence, the market has not yet produced such specifications floor tiles
A tile 80x80 cm. 30 yuan a piece. How much does a square meter cost
80 x 80 cm = 0.64 m2. 30 / 0.64 = 46.875 yuan / m2