GRE数学试题

A farmer has two rectangular fields. The larger field has twice the length and 4 times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount?
A.2K
B.6K
C.7K
D.8K
E.12K

参考答案

正确的答案：C