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Mathematics 15 Online
OpenStudy (anonymous):

Two flagpoles, one 8 m tall and the other 3 m tall, are connected by a piece of elastic string AC with length 13m. The two flagpoles are erected vertically on the ground BD. A boy has just knocked down flagpole CD to the position C'D such that B,C' and D lie on the same horizontal ground. It is given that

OpenStudy (anonymous):

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