A triangular prism which has 5 faces (two triangle and three rectangle)
Step 1. You must write down/ underline all the numbers given in the problem.
Step2. Identify all the unknown variable such as x, y, a, b [those are the most common ones].
Step 3 Identify what sign of operation your working with... It can be +,-,×,÷.
Step 3 write down all your terms on the LHS of the equation.
Step 4. Equate all the constant on the RHS of the equation. If the constant was negative It would be positive and vic versa
Step. Solve your problem
This should be the answer
The population density is 73.54 people per square kilometer
<em><u>Solution:</u></em>
Given that,
Area of europe =
square kilometers
Population = 
<em><u>To find: population density</u></em>
<em><u>The formula for population density is given as:</u></em>

<em><u>Substituting the values in formula, we get</u></em>

On rounding to nearest hundreth (two decimal places ), we get 73.54
Thus the population density is 73.54 people per square kilometer