How long is the horizontal bamboo ladder of 17?

6 meters. Bamboo ladders are commonly used in China. Bamboo is widely used because of its high strength and durability. Generally, the horizontal direction of the ladder is about 40 cm, and the height of the seventeen-step bamboo ladder is seven meters. But because the bamboo is getting thinner and thinner, the interval between the two rows is getting smaller and smaller, and the bamboo ladder is 6 meters. The bamboo used in the bamboo ladder is more than 20 meters high and more than 20 centimeters thick. Old bamboo is hairless and gradually turns from green to yellow. The leaves are small and thin, needle-shaped, and can be used as bamboo ladders for three years.