The depth of Lake Sengundo is 5/6 * 84 feet = <<5/6*84=70>>70 feet.
The elevation at the bottom of Lake Sengundo is 0 - 70 feet = <<0-70=-70>>-70 feet. Answer: \boxed{-70}.
Lake Profondo has a depth of 84 feet. Lake Sengundo is 5/6 as deep. What is the elevation at the bottom of Lake Sengundo?
1 answer