题有一只老鼠在圆湖边上碰见一只猫,它想回洞已经来不及了,只好跳入水中企图逃走,但猫在岸上等着它.假若猫在岸上奔跑的速度是老鼠在湖中游水的速度的四倍.请你仔细想一想,这只老鼠有没有办法逃掉?给出的答案是没有办法逃掉.理由如下: 事实上,设湖的半径为R,老鼠的游泳? There was a mouse with a cat on the edge of the lake. It was too late for the cat to jump back into the water in an attempt to escape, but the cat waited on the shore. If the cat was running on the shore, the speed of the mouse was to swim in the lake. The speed of the quadruple. Please think carefully, this mouse has no way to escape? The answer given is no way to escape. The reasons are as follows: In fact, set the radius of the lake to R, the mouse’s swimming?