39题,如下,题意就没看懂是怎么回事,有好心的童鞋帮忙解释下吗?谢谢~ 39、 .又是一道不懂,被rigid rod困住了 the length of the longest thin rigid rod that in right cylinder is 25 inches, the deep of the cylinder is 20 inches,问体积?(题目没看明白,所以就依稀这样啦) 选项有A.(225/4)*pai B.450pai C.550pai D.1125pai E.4500pai其中B.C两个选项不是很清楚 勾股定理 直径是15 d