UKMT Grey Kangaroo, 2020

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

The shortest path from Atown to Cetown runs through Betown. The two signposts shown are set up at different places along this path. What distance is written on the broken sign?

(A) $1$ km (B) $3$ km (C) $4$ km (D) $5$ km (E) $9$ km

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