F3 Maths

2012-01-06 5:32 am

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回答 (2)

2012-01-06 5:39 am
✔ 最佳答案
12->11.5
10->9.5
11.5*9.5=B
is it really F3 maths?
2012-01-06 7:55 am
SOLUTION

As the length and the breath are measured to the nearest cm,

11.5 <= length < 12.5

9.5 <= breath < 10.5

Area = length * breath

11.5 * 9.5 <= A < 12.5 * 10.5

109.25 <= A < 131.25

Answer (B)



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