Coordinate Geometry Question 135
Question: If the vertices of a triangle be $ (a,1),\ (b,3) $ and $ (4,c), $ then the centroid of the triangle will lie on x-axis, if
Options:
A) $ a+c=-4 $
B) $ a+b=-4 $
C) $ c=-4 $
D) $ b+c=-4 $
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Answer:
Correct Answer: C
Solution:
The point lies on axis of x, if $ y=0. $ Therefore, $ \frac{1+3+c}{3}=0\Rightarrow c=-4 $
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