Question

What is the lateral area of the drawing?

Answer 1

The lateral area of the shape is the sum of the area of all lateral faces.

The area of the lateral face that is rectangle with sides 5 mi and 2 mi is

$A=5\cdot 2=10\ mi^2.$

As you can see the shape has all four lateral faces of the same rectangular form with the same sides lengths, therefore,

$LA=4A=4\cdot 10=40\ mi^2.$

Answer: correct choice is B.