Consider the material structure tree for item A below. If 10 units of A are needed, how many units of E are needed?
A) 60
B) 6
C) 240
D) 24
E) 480

Question

Consider the material structure tree for item A below. If 10 units of A are needed, how many units of E are needed? 
A) 60 
B) 6 
C) 240 
D) 24 
E) 480

Quizplus · Accepted Answer

Each unit of A requires 4 units of B, each unit of B requires 3 units of C, each unit of C requires 2 units of D, and each unit of D requires 10 units of E. Therefore, to get one unit of A, we need:
4 x 3 x 2 x 10 = 240 units of E
To get 10 units of A, we need:
10 x 240 = 2400 units of E
Therefore, the answer is C) 240.

Consider the Material Structure Tree for Item a Below