1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The area of the figure formed by the lines

ax + by + c = 0, ax $$-$$ by + c = 0, ax + by $$-$$ c = 0 and ax $$-$$ by $$-$$ c = 0 is
A
$${{{c^2}} \over {ab}}$$
B
$${{{2c^2}} \over {ab}}$$
C
$${{{c^2}} \over {2ab}}$$
D
$${{{c^2}} \over {4ab}}$$
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If a line is perpendicular to the line 5x $$-$$ y = 0 and forms a triangle of area 5 sq units with coordinate axes, then its equation is
A
x + 5y $$\mp$$ 5$$\sqrt 2 $$ = 0
B
x $$-$$ 5y $$\mp$$ 5$$\sqrt 2 $$ = 0
C
5x + y $$\mp$$ 5$$\sqrt 2 $$ = 0
D
5x $$-$$ y $$\mp$$ 5$$\sqrt 2 $$ = 0
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The three lines 4x + 4y = 1, 8x $$-$$ 3y = 2, y = 0 are
A
the sides of an isosceles triangle
B
concurrent
C
mutually perpendicular
D
the sides of an equilateral triangle
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The line 3x + 4y $$-$$ 24 = 0 intersects the X-axis at A and Y-axis at B. Then, the circumcentre of the $$\Delta$$OAB, where O is the origin, is
A
(2, 3)
B
(3, 3)
C
(4, 3)
D
None of these
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12