Tong Tong Store will build a glass counter with a length of 2.5 meters, a width of 40 meters and a height of 80 meters, and install angle irons on both sides of the counter. How many meters of angle iron do you need?
1.
40 cm wide and 80 cm high, right?
Find the sum of edges, as follows:
(2.5+0.4+0.8) × 4 =14.8m.
2.
Bottom area: 160÷2=80 cm2.
Volume: 80×26=2080 cubic centimeters