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UKMT Senior Mathematical Challenge, 2015

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

The triangle shown has an area of 88 square units. What is the value of $y$ ?

(A) $17.6$ (B) $2\sqrt{46}$ (C) $6\sqrt{10}$ (D) $13\sqrt{2}$ (E) $8\sqrt{5}$

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