Q. 8

Mark against the A. -7

B. 7

C. 4

D. -4

Answer :

Given: Equation of plane is 2x – 4y + z = 7


Line lies on the given plane.


Formula Used: Equation of a line is



Where (x1, y1, z1) is a point on the line and b1, b2, b3 : direction ratios of line.


Explanation:


Let


So the given line passes through the point (4, 2, k)


Since the line lies on the given plane, (4, 2, k) is a point on the plane.


Therefore, substituting the point on the equation for the plane,


8 – 8 + k = 7


k = 7

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