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:

Rahi deposited Rs. 600 in a bank that promised 8% simple interest per annum. If Rahi kept the money with the bank for 5 years, she will earn an interest of

A) Rs. 240 B) Rs. 200
C) Rs. 280 D) Rs. 480
 
Answer & Explanation Answer: A) Rs. 240

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Q:

Simple interest on a sum for 10 years is equal to 5% of the principal. In how many years interest will be equal to the principal?

 

A) 100   B) 150
C) 200 D) 250
 
Answer & Explanation Answer: C) 200

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0 477
Q:

Simple interest on a sum of Rs 50200 for 3 months is Rs 1380.5. What is the rate (in percentage) of interest per annum?

 

A) 11 B) 9
C) 9.5 D) 8.5
 
Answer & Explanation Answer: A) 11

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2 478
Q:

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

A) Rs. 900 B) Rs. 450
C) Rs. 1800 D) Rs. 2700
 
Answer & Explanation Answer: A) Rs. 900

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Q:

Manish lent out Rs 20000 in two parts. He put out first part at 6% and the second part at 8% interest. The yearly average interest comes out to be 6.4%.What are the amounts (in Rs) that were lent at 6% and 8% respectively?

 

A) 16000, 4000 B) 12000, 8000
C) 15000, 5000 D) 18000, 2000
 
Answer & Explanation Answer: A) 16000, 4000

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Q:

The simple interest at y% for 'y' years will be Rs. y on a sum. Find the principal amount.


 

A) 100/y B) 100 x y
C) 100y2 D) 100 ÷ y2
 
Answer & Explanation Answer: A) 100/y

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Q:

A sum becomes Rs 8800 in 4 years at simple interest at the yearly interest rate of 25% per annum. What is the sum (in Rs)?

 

A) 4400 B) 6600
C) 7040 D) 6400
 
Answer & Explanation Answer: A) 4400

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Q:

The interest earned on Rs. 2250 at the rate of 3% simple interest per annum for 2 years will be

A) Rs. 67.50 B) Rs. 135
C) Rs. 202.50 D) Rs. 225
 
Answer & Explanation Answer: B) Rs. 135

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