There are four cuboid pillars in the hall. The bottom is a square with a side length of 0.6 meters and a height of 5 meters. How many square meters do these pillars cover

There are four cuboid pillars in the hall. The bottom is a square with a side length of 0.6 meters and a height of 5 meters. How many square meters do these pillars cover

Each one covers an area of 0.6 * 0.6 square meters. It has nothing to do with the height
=0.6*0.6*4
=1.44 square meters
So the total area is 1.44 square meters

In a shopping mall, there are eight cuboid columns with a height of 5 meters. The bottom of the column is 6 decimeters long and 4 decimeters wide. If you want to paint these columns, what is the paint area

80 square meters

Use a 7-meter-long rope to circle the hall pillar for 2 times, with 0.72 meters left. What is the floor area of this pillar?

(7-0.72) △ 2 △ 3.14 △ 2, = 6.28 △ 2 △ 3.14 △ 2, = 1 △ 2, = 0.5 (m); 3.14 × 0.52, = 3.14 × 0.25, = 0.785 (M2); a: the floor area of this column is 0.785 m2