1
IIT-JEE 1983
MCQ (Single Correct Answer)
+1
-0.25
The points with position vectors $$60i+3j,$$ $$40i-8j,$$ $$ai-52j$$ are collinear if
A
$$a=-40$$
B
$$a=40$$
C
$$a=20$$
D
none of these
JEE Advanced Subjects