Q. 5

Mark the correct alternative in each of the following:

If and points are collinear, then a is equal to

A. 40

B. –40

C. 20

D. –20

Answer :

A (, B () & C () are collinear,


Then











Comparing the LHS & RHS of the above mentioned equation,






-80 = a – 40


a = 40 – 80


a = -40


a = -40


Option (B) is the answer.

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