返回列表 发帖

GWD-12-33

What is the volume of the cube above?

(1)   The surface area of the cube is 600 square inches.

(2) The length of diagonal AB is 103 inches.

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案是D,但是根据(1)得出ab+ac+bc=300,根据(2)得出a2+b2+c=300,三个未知数要有三个方程才能解出啊,为什么答案不是E呢?请指教

收藏 分享

a=b=c

TOP

agree with insonbia13

TOP

返回列表

站长推荐 关闭


美国top10 MBA VIP申请服务

自2003年开始提供 MBA 申请服务以来,保持着90% 以上的成功率,其中Top10 MBA服务成功率更是高达95%


查看