如图,一条公路的转弯处是一段圆弧(图中的),点O是这段弧的圆

如图,一条公路的转弯处是一段圆弧(图中的),点O是这段弧的圆心,C上一点,OCAB,垂足为DAB300mCD50m,则这段弯路的半径是       m.

答案

250

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