The length of each side of a decagon that is 65 units total, each side will be 6.5 units.
Decagon = 10 sides.
65 ÷ 10 = 6.5
Answer:
B. Rock and soil that is removed to mine ore.
Explanation:
Overburden is a material or substances that is present above the metal ore. This metal ore is present inside the rock and soil so for its extraction the rock and soil must be removed that is present above it. Metal ore such as gold, silver,coal, iron and platinum are present inside the earth crust. These metals are not present in pure form some soil particles or other substances are present with it which is removed with the help of various instruments and machines.
