Mathematics, 20.03.2020 18:47, 3300

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}400π m400, pi, start text, space, m, end text. What is the diameter ddd of the lake?

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You are standing next to a really big circular lake. You want to measure the diameter of the lake, b...