The lobby of a hotel has 6 large cylindrical columns, 10 meters high and 25.12 decimeters in circumference. All the columns should be painted. If the painting fee per square meter is 80 yuan, how much will it cost?

The lobby of a hotel has 6 large cylindrical columns, 10 meters high and 25.12 decimeters in circumference. All the columns should be painted. If the painting fee per square meter is 80 yuan, how much will it cost?

25.12 decimeters = 2.512 meters, the total area to be painted: 2.512 × 10 × 6, = 150.72 (square meters), 150.72 × 80 = 12057.6 (yuan); answer: the total cost of painting these columns is 12057.6 yuan

There are six cylindrical columns in the lobby of a hotel. The diameter of the bottom of the column is 4 decimeters. All the columns should be painted. If the cost of painting is per square meter, the cost of painting should be calculated

4 × 3.14 × 10 × 6 × 80 = 6028.8 yuan

There are six cylindrical columns in the lobby of a hotel, with a perimeter of 25
There are 6 cylindrical columns in the lobby of a hotel, which are 10 meters high and 15.7 decimeters in circumference. All of them need to be painted. How much is it if the painting fee is 80 yuan per square meter?

Painting area of each large cylindrical column: 1.57 × 10 = 15.7 square meters
The cost of painting: 15.7 × 6 × 80 = 7536 yuan