AlgebraDifficulty 2.0JuniorFind the answerUnited Kingdom
The diagram shows a plan of a town with various bus stops. There are four bus routes in the town. Route 1 goes C−D−E−F−G−H−C and is 17 km long. Route 2 goes A−B−C−F−G−H−A and is 12 km long. Route 3 goes A−B−C−D−E−F−G−H−A and is 20 km long. Route 4 goes C−F−G−H−C. How long is route 4?
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