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单选题
The base of a rectangle is two times as long as the height. If the perimeter is 42, what is the area of the rectangle?
A
36
B
42
C
98
D
196
E
218
参考答案
参考解析
解析：
If h represents the height, then the base is 2h. Since Perimeter=42=2(h+2h), hence h=7 and base=14. So Area=7×14=98.
If h represents the height, then the base is 2h. Since Perimeter=42=2(h+2h), hence h=7 and base=14. So Area=7×14=98.
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