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Q:

What is the compound interest earned at the end of 3 years?

I. Simple interest earned on that amount at the same rate and for the same period is Rs. 4500.

II.The rate of interest is 10 p.c.p.a.

III.Compound interest for 3 years is more than the simple interest for that period by Rs.465.

A) I and II only B) II and III only
C) I and III only D) Either II or III only

Answer:   D) Either II or III only



Explanation:

 

 

 

 

 

 

I. gives, S.I for 3 years = Rs. 4500.

 

 

 

II. gives, Rate = 10% p.a.

 

 

 

III. gives, (C.I.) - (S.I.) = Rs. 465.

 

 

 

Clearly, using I and III we get C.I. = Rs. (465 + 4500).

 

 

 

Thus, II is redundant.

 

 

 

Also, from I and II, we get sum =

 

 

 

100 x 4500

 

 

 

= 15000.

 

 

 

10 x 3

 

 

 

Now C.I. on Rs. 15000 at 10% p.a. for 3 years may be obtained.

 

 

 

Thus, III is redundant.

 

 

 

Either II or III is redundant.

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C) 27 D) 29
 
Answer & Explanation Answer: A) 21

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If sinθ+ cosecθ=2, then the value of sin-7+cosec7 is

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C) 2 D) 2-1
 
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Length of three line segments isgiven. Is construction of a triangle possible with the segments in the given cases?

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Answer & Explanation Answer: B) 8 cm, 15 cm, 17 cm

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From an external point two tangents to a circle are drawn. The chord passing through the points of contact subtends an angle72° at the centre. The angle between the tangents is?

A) 36° B) 72°
C) 108° D) 144°
 
Answer & Explanation Answer: C) 108°

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If x+3y=-3x+y, then x22y2 is equal to

A) 1/8 B) 1/2
C) 1/4 D) 4
 
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If a2+1=a, then the value of a3 is

A) 0 B) 1
C) -1 D) 2
 
Answer & Explanation Answer: C) -1

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A train 240 meters in length crosses a telegraph post in 16 seconds. The speed of the train is?

A) 50 Km/hr B) 52 Km/hr
C) 54 Km/hr D) 56 Km/hr
 
Answer & Explanation Answer: C) 54 Km/hr

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In a Village panchayat society 574 names are enlisted as 'below poverty level'. If 14% of the villagers are below poverty level, the total number of villagers is?

A) 4100 B) 4200
C) 4000 D) 3800
 
Answer & Explanation Answer: A) 4100

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