問題詳情
9. A cylindrical tank of height H is open at the top and has a diameter of D. It is filled
with water up to a height of h. Which quantity is linearly proportional to the time it
takes to empty the tank through a hole of radius R in its bottom?
(A) H；
(B) D；
(C) h；
(D) R；
(E) None.
參考答案
答案：E
難度：計算中-1
書單：沒有書單，新增