1
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A flower-bed in the form of a sector has been fenced by a wire of 40 m length. If the flower-bed has the greatest possible area, then what is the radius of the sector?
A
25 m
B
20 m
C
10 m
D
5 m
2
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is the minimum value of $${[x(x - 1) + 1]^{{1 \over 3}}}$$, where 0 $$\le$$ x $$\le$$ 1 ?
A
$${\left( {{3 \over 4}} \right)^{{1 \over 3}}}$$
B
1
C
$${1 \over 2}$$
D
$${\left( {{3 \over 8}} \right)^{1/3}}$$
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Read the following information for the next three items that follow.

Three sides of a trapezium are each equal to 6 cm. Let $$\alpha \in \left( {0,{\pi \over 2}} \right)$$ be the angle between a pair of adjacent sides.
If the area of the trapezium is the maximum possible, then what is $$\alpha$$ equal to?
A
$${{\pi \over 6}}$$
B
$${{\pi \over 4}}$$
C
$${{\pi \over 3}}$$
D
$${{2\pi \over 5}}$$
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Read the following information for the next three items that follow.

Three sides of a trapezium are each equal to 6 cm. Let $$\alpha \in \left( {0,{\pi \over 2}} \right)$$ be the angle between a pair of adjacent sides.
If the area of the trapezium is maximum, what is the length of the fourth side?
A
8 cm
B
9 cm
C
10 cm
D
12 cm
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