Two students, A and B, start climbing from the foot of the mountain at the same time, and descend immediately after reaching the top of the mountain. Constantly moving back and forth between the foot of the mountain and the top of the mountain. It is known that the length of the hillside is 360 meters, and the speed ratio of A and B going up the hill is 6:4. And the speed of A and B going down the mountain is 1.5 times of their respective uphill speed. When A reaches the top of the mountain for the third time, how many meters is B's position from the top of the mountain at this time?
甲乙两名同学同时从山脚同时开始爬山，到达山顶后立即下山．在山脚和山顶之间不断往返运动．已知山坡长度是360米，甲乙上山的速度比是6：4．并且甲乙下山的速度都是各自上山速度的1.5倍．当甲第三次到达山顶时，则此时乙所在的位置离山顶是多少米．
<result>120</result>