求助一道数学题~~A wildlife preserve is being planned for

不扬帆也要启程 · 发表于 2011-3-9 10:28:43

A wildlife preserve is being planned for 3,000 rhinoceroses. The preserve is to contain a total of 10,000 acres of watering area, plus 100 acres of grazing area for each rhinoceros. If the number of rhinoceroses is expected to increase by 10 percent, how many thousand acres should the preserve have in order to provide for the increased population?(A) 340
(B) 330
(C) 320
(D) 310
(E) 300
我是这么做的增加10%那就是多了300个
10，000*300/3000+100*300=31,000
怎么没有答案呢~~ 求解释！！！
答案蓝皮书上说是A 也有的版本说是C 求解释~~

谢谢各位大牛~~~

sdcar2010 · 发表于 2011-3-9 10:34:01

This is a 3rd math.

Total area = 10,000 + 3,300*100 = 340,000

A is the answer.

不扬帆也要启程 · 发表于 2011-3-9 23:17:08

但是问题是how many thousand acres should the preserve have in order to provide for the increased population?意思不应该是说增加多少acres吗

求助一道数学题~~A wildlife preserve is being planned for

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