1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What is the equation of the line passing through the point of intersection of the lines $$x + 2y - 3 = 0$$ and $$2x - y + 5 = 0$$ and parallel to the line $$y - x + 10 = 0$$ ?
A
$$7x - 7y + 18 = 0$$
B
$$5x - 7y + 18 = 0$$
C
$$5x - 5y + 18 = 0$$
D
$$x - y + 5 = 0$$
2
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following statements

I. The length p of the perpendicular from the origin to the line ax + by = c satisfies the relation $${p^2} = {{{c^2}} \over {{a^2} + {b^2}}}$$.

II. The length p of the perpendicular from the origin to the line $${x \over a} + {y \over b} = 1$$ satisfied the relation $${1 \over {{p^2}}} = {1 \over {{a^2}}} + {1 \over {{b^2}}}$$.

III. The length p of the perpendicular from the origin to the line y = mx + c satisfies the relation $${1 \over {{p^2}}} = {{1 + {m^2} + {c^2}} \over {{c^2}}}$$.

Which of the above is/are correct?
A
I, II and III
B
I only
C
I and II
D
II only
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What is the equation of the straight line passing through the point (2, 3) and making an intercept on the positive Y-axis equal to twice its intercept on the positive X-axis?
A
2x + y = 5
B
2x + y = 7
C
x + 2y = 7
D
2x $$-$$ y = 1
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The perpendiculars that fall from any point of the straight line 2x + 11y = 5 upon the two straight lines 24x + 7y = 20 and 4x $$-$$ 3y = 2 are
A
12 and 4 respectively
B
11 and 5 respectively
C
Equal to each other
D
Not equal to each other
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