Use the Graph to Solve the Problem $\mathrm { A }$

Multiple Choice

Use the graph to solve the problem.
-The graph shows the relationship between the area $\mathrm { A }$ of a rectangle and the length $\mathrm { L }$ , if the width is fixed. Find the area if the length is $20 \mathrm {~cm}$ .

A) $238 \mathrm {~cm} ^ { 2 }$
B) $280 \mathrm {~cm} ^ { 2 }$
C) $224 \mathrm {~cm} ^ { 2 }$
D) $308 \mathrm {~cm} ^ { 2 }$