3
Q:

Question :

What is the sum which earned interest ?

Statements :

a. The total simple interest was Rs. 9000 after 9 years.
b. The total of sum and simple interest was double of the sum after 6 years.

A) Only a is sufficient B) Neither a nor b is sufficient
C) Only b is sufficient D) Both a and b sufficient

Answer:   D) Both a and b sufficient



Explanation:

Let the sum be Rs. x

a. gives, S.I = Rs. 9000 and time = 9 years.

b. gives, Sum + S.I for 6 years = 2 x Sum

--> Sum = S.I for 6 years.


Now, S.I for 9 years = Rs. 9000

S.I for 1 year = Rs. 9000/9 = Rs. 1000.

S.I for 6 years = Rs. (1000 x 6)= Rs. 6000.

--> x = Rs. 6000

Thus, both a and b are necessary to answer the question.

Subject: Simple Interest
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Q:

A sum of money of Rs. 1000 is lent out in two parts in such a way that the interest on one part at 10% per annum for 5 years is equal to another at 5% for 10 years. Calculate the sum lent out at 5%.

A) Rs. 500 B) Rs. 800
C) Rs. 1000 D) Rs. 1200
 
Answer & Explanation Answer: A) Rs. 500

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Q:

Puneet lent out Rs 30000 in two parts, one at 5% and the other at 9% interest. The yearly average interest comes out to be 6%. What are the amounts (inRs) that are lent at 5% and 9% respectively?

 

A) 20000, 10000   B) 22500, 7500  
C) 18000, 12000   D) 21000, 9000
 
Answer & Explanation Answer: B) 22500, 7500  

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2 449
Q:

Ms. Alina borrowed Rs.650 at 6% per annum simple interest. What amount will she pay to clear her debt after 4 years?

A) Rs. 165 B) Rs. 860
C) Rs. 806 D) Rs. 156
 
Answer & Explanation Answer: C) Rs. 806

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Q:

Rs. x invested at 9% simple interest per annum for 5 years yields the same interest as that on Rs. y invested at 6.25% simple interest per annum for 8 years. Find x:y.

 

 

A) 16:15   B) 10:9  
C) 45:50   D) 5:8
 
Answer & Explanation Answer: B) 10:9  

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4 658
Q:

A sum of 2,000, invested at the rate of 8.5% simple interest per annum for 6years will yield an interest of

A) Rs. 935 B) Rs. 1020
C) Rs. 510 D) Rs. 1275
 
Answer & Explanation Answer: B) Rs. 1020

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Q:

Ms. Kavitha borrowed Rs. 950 at 6% per annum simple interest. What amount will she pay to clear her debt after 4 years?

A) 282 B) 1187
C) 1178 D) 228
 
Answer & Explanation Answer: C) 1178

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Q:

The simple interest on a sum is 7/8 of the principal for 5 years. What is the rate (in percentage) of interest per annum?

 

A) 15 B) 17.5
C) 14 D) 22.5
 
Answer & Explanation Answer: B) 17.5

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4 463
Q:

The interest earned on Rs. 3675 at the rate of 4% simple interest per annum for 2 years will be

A) Rs. 294 B) Rs. 289.50
C) Rs. 292 D) Rs. 288.50
 
Answer & Explanation Answer: A) Rs. 294

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