Q. The in-radius of an equilateral traingle is of length 3 cm. Then the length of each of its medians is :
Answer: 9 cm
Notes: In the equilateral triangle centroid, incentre, orthocentre, coincide at the same point. ∴ Height $latex \div$ 3 = in radius ∴ Height = Median = 3$latex \times$3 = 9 cm Hence option [B] is the right answer.

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