Sorry that this is a long question, what are the cube roots of: 343, 1, -27, 1/25, -216, and 8/343. *if not a dumb answer, will mark as brainliest

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?