Quantitative Aptitude - Arithmetic Ability Questions

Q:

The height of a tower is 300 meters. When its top is seen from top of another tower,then the angle of depression is 60°. The horizontal distance between the bases of the two towers is 120 metres. What is the height (in metres) of the small tower?

A) 88.24 B) 106.71
C) 92.15 D) 112.64
 
Answer & Explanation Answer: C) 92.15

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Q:

If 2cosec2A = x, then the value of x is

A) 1/(1 - cosecA) - 1/(1 + cosecA) B) 1/(1 + sinA) + 1/(1 - tanA)
C) 1/(1 + cosA) + 1/(1 - cosA) D) 1/(1 - tanA) - 1/(1 + sinA)
 
Answer & Explanation Answer: C) 1/(1 + cosA) + 1/(1 - cosA)

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Filed Under: Simplification
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Q:

If Sin 31° = xy, then the value of Sec 31° - Sin 59° is

A) x2yy2-x2 B) -x2yy2-x2
C) -y2y2-x2 D) x
 
Answer & Explanation Answer: A) x2yy2-x2

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Q:

If 21% of an electricity bill is discounted, Rs 1817 is still to be paid. How much was the original bill amount?

A) Rs 1502 B) Rs 2336
C) Rs 2300 D) Rs 1538
 
Answer & Explanation Answer: C) Rs 2300

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Filed Under: Percentage
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Q:

What is the simplified value of cosec 2A + cot 2A?

A) sec A B) sec (A/2)
C) cot A D) cot2 A
 
Answer & Explanation Answer: C) cot A

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Q:

A square ground is to be covered by planting 100 saplings on each side. How many saplings are needed in all?

 

A) 400 B) 404
C) 396 D) 408
 
Answer & Explanation Answer: C) 396

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Filed Under: Area
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Q:

A total amount of Rs. 1560 is to be divided among A, B, C such that A gets 50% of what B gets and B gets 20% of what C gets. How much will B get ?

A) Rs. 540 B) Rs. 440
C) Rs. 280 D) Rs. 240
 
Answer & Explanation Answer: D) Rs. 240

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Q:

What is the measure of the central angle of the sector whose area is 462 sq cm and radius of the circle is 21 cm?

A) 90° B) 60°
C) 30° D) 120°
 
Answer & Explanation Answer: D) 120°

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Filed Under: Area
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