[" 4.If in a triangle "ABC" .AD,"BE" and...

[" 4.If in a triangle "ABC" .AD,"BE" and "CF" are the altitudes and "R" is the circumradius,then the "],[" radius of the circumcircle of "Delta DEF" is "],[[" (A) "(R)/(3)," (B) "(2R)/(3)],[" (C) "(1)/(3)R," (D) None of these "],[" LABC "," (TR AD.BE CF fonfo thife,R destrant reca ADEF afferaming ard "],[" (A) "(R)/(2)],[" (C) "(1)/(3)R]]

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