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标题: gwd-25-10 [打印本页]

作者: smallkiddy 时间: 2006-6-7 13:11 标题: gwd-25-10

Q10 The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The least possible value of the actual area of the square region is

A.36.00 sq cm

B.35.00 sq cm

C.33.75 sq cm

D.30.25 sq cm

E.25.00 sq cm

这个题答案C，怎么算出来的呢？

作者: sportman 时间: 2006-6-8 07:03

measured to the nearest centimeter => side > 5.5 cm
5.5 * 5.5 = 30.25
=> least possible value is > 30.25 => 33.75

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