1、As is shown in the picture, two ants are walking along the side of a standard triangle;

题目

1、As is shown in the picture, two ants are walking along the side of a standard triangle;
1、As is shown in the picture, two ants are walking along the side of a standard
triangle; they start at the same time from Point A and Point B to Point C. Ant A
waik along the side clock wisely(顺时针)by 1cm per second; AntB get back when meet
Point A or C by 1.8cm per second. How long will Anta and B meet each other for
the first fime?

答案

where is your picture?
需要知道正三角形ABC的边长.
三角形ABC的周长=蚂蚁B走的距离-蚂蚁A走的距离=（1.8-1）×时间
求出时间就行了.