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 Rs. 4000 is lent out in two parts, one at 8% simple interest and the other at 10% simple interest. If the annual interest is Rs. 352. The sum lent at 8% is

A) Rs. 2900 B) Rs. 2200
C) Rs. 2400 D) Rs. 3100
 
Answer & Explanation Answer: C) Rs. 2400

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2 986
Q:

The simple and compound interest that can be earned in two years at the same rate is Rs 4000 and Rs 4180 respectively. What is the rate (percent per annum) of interest?

A) 18 B) 4.5
C) 9 D) 12
 
Answer & Explanation Answer: C) 9

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2 977
Q:

If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?

A) 1865.2 B) 2065.2
C) 1965.2 D) 1765.2
 
Answer & Explanation Answer: B) 2065.2

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1 719
Q:

The simple and compound interest that can be earned in two years at the same rate is Rs 1,000 and Rs 1,040 respectively. What is the rate (percent per annum) of interest?

A) 9 B) 10
C) 8 D) 11
 
Answer & Explanation Answer: C) 8

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3 822
Q:

Albert invested an amount of x rupees in a fixed deposit scheme offering 10% per annum for 1st year and 15% per annum for 2nd year and received an amount of Rs 20,240 after the two years. What is x (in Rs)?

A) 15000 B) 16000
C) 14000 D) 18000
 
Answer & Explanation Answer: B) 16000

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12 2042
Q:

A sum fetched a total simple interest of Rs 1200 at the rate of 7.5%/yr in 4 years. What is the sum (in Rs)?

A) 4000 B) 6000
C) 8000 D) 7500
 
Answer & Explanation Answer: A) 4000

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1 854
Q:

In simple interest rate per annum a certain sum amounts to Rs. 5,182 in 2 years and Rs. 5,832 in 3 years. The principal in rupees is

A) Rs. 2882 B) Rs. 5000
C) Rs. 3882 D) Rs. 4000
 
Answer & Explanation Answer: C) Rs. 3882

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0 761
Q:

If a sum of money doubles itself in 8 yrs, then the interest rate in percentage is ?

A) 8 1⁄2% B) 10%
C) 10 1⁄2 % D) 12 1⁄2 %
 
Answer & Explanation Answer: D) 12 1⁄2 %

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2 745