What is the circum radius of a triangle whose sides are 7, 24 and 25 units respectively?

 [ A ]    18 unit [ B ]    12.5 unit [ C ]    12 unit [ D ]    14 unit
 Answer : Option B Explanation : 7, 24, 25 is a Pythagorean triplet. Therefore, the given triangle is a right angled triangle.In a right-angled triangle, the median to the hypotenuse is half the hypotenuse and is also the circum-radius of the triangle.As the hypotenuse is 25, the circum radius is 12.5