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两个探险队员用软梯下到一个深谷,准备探寻谷底的一个洞穴。到达谷底刚走了几米,忽然有泉水大量涌出,霎时水位就到了腰部,并在不断上涨。他们没预料到这种情况。两人都不会游泳,又没带潜水救生用具,只能立刻攀软梯出谷。但软梯只能负重120公斤,而他们两人的体重加起来有150公斤。刚才下来时,他们是一个一个下来的。此时,如果两人同时攀
The two expedition members went down to a deep valley with a soft ladder, ready to explore a cave in the bottom of the valley. Reaching the bottom of the valley just a few meters away, suddenly a large number of spring water poured out, an instant water level to the waist, and rising. They did not expect this. They will not swim, and did not bring diving life-saving appliances, can only climb the ladder immediately out of the valley. However, the ladder can only load 120 kilos, while both weigh 150 kilos. Just come down, they are one by one down. At this point, if both climb at the same time