Traditional Culture Encyclopedia - Hotel reservation - There are 8 columns in the lobby of a hotel. The perimeter of the bottom of each column is 25. 12dm and the height is 7m. How much does it cost to paint these columns (per square meter 10.5 yuan)?

There are 8 columns in the lobby of a hotel. The perimeter of the bottom of each column is 25. 12dm and the height is 7m. How much does it cost to paint these columns (per square meter 10.5 yuan)?

25. 12/3. 14=8 (DM)

8/2=4 (DM)

3. 14*4 squared =50.24(dm2)

3. 14 * 8 * 70 = 1758.4(dm2)

(50.24*2+ 1758.4)*8* 10.5