1.

The centroid of  ΔABC is (2, 7). If A = (4, 8), B = (a, 0) and C = (0, b), then(A)   a = 2, b = 13(B)   a = 2, b  = 13(C)   a = 13, b = 2(D)   a = 2, b = -13

Answer»

Correct option  (b)  a = 2, b = 13

Explanation :

By hypothesis

(4 + a + 0)/3 = 2 and (8 + 0 + b)/3 = 7

This implies a = 2, b = 13.



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