Mathematics (NTSE Stage1 (StateLevel) ScholasticAptitude & Language Comprehension): Questions 171  175 of 224
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Question number: 171
» Mathematics » Trigonometry
Question
An aero plane flying at a height of 300 m above the ground phase vertically above another plane at an instant when the angle of elevation of the two planes from the same point on the ground are and , respectively. The height of the lower plane from the ground (in m) is
Choices
Choice (4)  Response  

a.  150 

b. 


c.  50 

d. 


Question number: 172
» Mathematics » Percentage
Question
A rise of in the price of grapes compels a person to buy kg of grapes less for Rs. 240. Then, the original price of grapes per kg is
Choices
Choice (4)  Response  

a.  Rs. 30 

b.  Rs. 32 

c.  Rs. 40 

d.  Rs. 28 

Question number: 173
» Mathematics » Quadratic Equations
Question
If, then the value of is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 174
» Mathematics » Mensuration
Question
The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm, respectively. The total area to be painted is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 175
» Mathematics » Basic Geometry
Question
In a circle of radius 17 cm, two parallel chords are drawn on opposite side of a diameter. The distance between the chords is 23 cm. If the length of one chord is 16 cm, then the length of the other is
Choices
Choice (4)  Response  

a.  23 cm 

b.  30 cm 

c.  34 cm 

d.  15 cm 
