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Algebra Difficulty 1.0 Junior Find the answer Canada

The water surface of Lake Superior is at an elevation of $180$ m above sea level. The lowest point of the lake floor is $220$ m below sea level. What is the actual depth of the lake at this point?

(A) $40$ m (B) $300$ m (C) $380$ m (D) $400$ m (E) $500$ m

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.