数学题:用一根铁丝刚好焊成一个棱长10厘米的正方体框架，如果用这根铁丝焊成一个长12厘米，宽8厘米的长方体框架，他高应该是多少厘米？

数学题解答：这道题要用到长方体和正方体的棱长总和的知识。

长方体的棱长总和＝（长+宽+高）×4

正方体的棱长总和＝棱长×12

先用正方体的棱长算出它的棱长总和，也就是铁丝的长度：10×12=120（厘米）

再用铁丝的长度来计算长方体的高：120÷4 – 12 – 8 = 10（厘米）

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