75o
60o
45o
30o
0o
Correct answer is D
\(\theta_{1} = \theta_{2} = 30°\)
calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
86cm2
154cm2
616cm2
1434cm2
4312cm2
Correct answer is C
Surface area of a sphere = \(4\pi r^2\)
= \(4 \times \frac{22}{7} \times 7 \times 7\)
= \(616 cm^2\)
6o
26o
52o
103o
206o
Correct answer is D
πr2 = 360o
Solve the equation 2a\(^2\) - 3a - 27 = 0
3/2, 9
-2/3, 9
3, 9/2
-3, -9/2
-3, 9/2
Correct answer is E
2a\(^2\) - 3a - 27 = 0
2a\(^2\) - 9a + 6a - 27 = 0
a(2a - 9) + 3(2a - 9) = 0
(a + 3)(2a - 9) = 0
a = -3 or a = \(\frac{9}{2}\)
Find the value of m which makes x\(^2\) + 8 + m a perfect square
2
4
8
12
16
Correct answer is E
x\(^2\) + 8 + m
To make it a perfect square, we add \((\frac{b}{2})^2\)
= \((\frac{8}{2})^2\)
= 16
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