b***k
发帖数: 2673 | 1 ☆─────────────────────────────────────☆
swordmans (风云第一刀) 于 (Mon Nov 23 14:31:33 2009, 美东) 提到:
There are two boat, the first boat travels at 20M/H toward east, another
boat is at 60M north of the first boat
and travels at 30M/H towards the first boat. What is the trajectory of
second boat and when will they met?
☆─────────────────────────────────────☆
redtulips (dang dang dang) 于 (Mon Nov 23 14:33:36 2009, 美东) 提到:
这算是数学吧。
☆─────────────────────────────────────☆
Jadeson (Jadeson) 于 |
|
