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In the stair unit in the figure above, all the angles are right angles. The left side is 5'4", and the bottom is 9'2". Each vertical riser is 8". The top step is 10(1/4)", and each step below it is 1" more than the preceding step.

Quantity A

The perimeter, in inches of the figure above

Quantity B

300


答案:A

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Quantitative Comparison

老师这题不是29.2吗?
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Quantitative Comparison

老师为什么不选B 算出来等于29.2

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