第66章知识
:x
500x10=5000
6000÷15=333.3
由此得出,花岗石峭壁的高度是三百三十三英尺。
the two horizontal distances were found out by means of the pole, whose length above the sand was exactly ten feet.
the first distance was fifteen feet between the stickand the place where the pole was thrust into the sand.
the second distance between the stick and the bottom of the cliff was five hundred feet. from which it was proved that the granite cliff measured 333 feet in height.
圆规两脚之间的距离
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