Subject

Quantitative Aptitude

Class

SSCCGL Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

61.

ABCD is a cyclic trapezium in which AD || BC. If ∠ABC = 70°, then ∠BCD is

  • 110°

  • 80°

  • 70°

  • 90°

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62.

If cos 27° = x, then value of 63° is

  • fraction numerator straight x over denominator square root of 1 minus straight x squared end root end fraction
  • fraction numerator straight x over denominator square root of 1 plus straight x squared end root end fraction
  • fraction numerator square root of 1 minus straight x squared end root over denominator straight x end fraction
  • fraction numerator square root of 1 minus straight x squared end root over denominator straight x end fraction
82 Views

63.

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19, find the first term:

  • 3

  • 5

  • 7

  • 7

115 Views

64.

The average of marks obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidates is 35 and that of failed candidates is 10, what is the number of candidates who passed the examination?

  • 60

  • 70

  • 80

  • 80

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65.

If a + b = 10 and ab = 21, then the value of (a - b)2 is

  • 15

  • 16

  • 17

  • 17

62 Views

66.

If (x - 4) (x2 + 4x + 16) = x3 - p, then p is equal to

  • 27

  • 8

  • 64

  • 64

47 Views

67.

G is the centroid of Δ ABC. If AG = BC, then measure of ∠BGC  is

  • 45°

  • 60°

  • 90°

  • 120°

389 Views

68.

In a circle, a chord 5√2 cm long, makes a right angle at the centre. Then the length of the radius of the circle will be

  • 2.5 cm

  • 5 cm

  • 7.5 cm

  • 10 cm

96 Views

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69.

If cos2x + cos4x = 1, then tan2x + tan4x = ?

  • 0

  • 1

  • 2tan2x

  • 2tan2x

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70.

The angle of elevation of aeroplane from a point on the ground is 45°. After flying 15 sec, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 m, then the speed of the aeroplane in km/hr is

  • 600

  • 600( √3 + 1 )

  • 600√3

  • 600( √3 - 1 )


D.

600( √3 - 1 )



In Δ ABC,

 



In Δ BED,




∴  Speed of the aeroplane

            

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