30
Q:

The population of a town was 3600 three years back. It is 4800 right now. What will be the population three years down the line, if the rate of growth of population has been constant over the years and has been compounding annually?

A) Rs.600 B) Rs,6400
C) Rs.6500 D) Rs.6600

Answer:   B) Rs,6400



Explanation:

 

The population grew from 3600 to 4800 in 3 years. That is a growth of 1200 on 3600 during three year span.

 

Therefore, the rate of growth for three years has been constant.

 

The rate of growth during the next three years will also be the same.

 

Therefore, the population will grow from 4800 by 4800*13= 1600

 

Hence, the population three years from now will be 4800 + 1600 = 6400

Q:

Amit borrowed a sum of Rs. 25,000 on simple interest. Bhola borrowed the same amount on compound interest(interest compounded yearly). At the end of 2 years, Bhola had to pay Rs. 160 more interest than Amit. The rate of interest charged per annum is:

 

A) 1625∘∘ B) 825∘∘
C) 8∘∘ D) 318∘∘
 
Answer & Explanation Answer: C) 8∘∘

Explanation:
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2 774
Q:

A sum of Rs 15000 is lent at compound interest (compounded annually) at an interest rate of 20% per annum. If the interest is compounded half yearly, then how much more interest (in Rs) will be obtained in one year?

 

A) 225   B) 150  
C) 75   D) 300
 
Answer & Explanation Answer: B) 150  

Explanation:
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3 591
Q:

A sum of money when invested for a year at the rate of 10% interest per annum compounded half-yearly becomes ₹ 44,100 at maturity. The sum invested was ............

 

A) ₹ 40000 B) ₹ 40500
C) ₹ 39800 D) ₹ 40250
 
Answer & Explanation Answer: A) ₹ 40000

Explanation:
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2 707
Q:

A certain sum amounts to Rs.280900 in 2 years at 6% per annum, interest compounded annually. The sum is:

 

A) Rs.250000 B) Rs.200000
C) Rs.350000 D) Rs.550000
 
Answer & Explanation Answer: A) Rs.250000

Explanation:
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0 663
Q:

₹ 10000, invested at 30% rate of interest per annum. but compounded every four months, will give an amount of ₹ ...... in one year.

 

A) 13270 B) 13000
C) 13300 D) 13310
 
Answer & Explanation Answer: D) 13310

Explanation:
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1 3588
Q:

The compound interest on a certain sum at the end of two years is Rs.408. The simple interest on the same sum for the same time is Rs.400. The rate of interest per annum is:

 

 

A) 2% B) 80%
C) 40% D) 8%
 
Answer & Explanation Answer: A) 2%

Explanation:
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2 784
Q:

Rs 10000 is kept at compound interest at an interest rate of 18% per annum (compounding annually). If the compounding of interest is done half yearly, then how much more interest (in Rs) will be obtained?

 

A) 243 B) 324
C) 81 D) 162
 
Answer & Explanation Answer: C) 81

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4 634
Q:

A sum of Rs 6000 is borrowed at compound interest at the rate of 8% per annum. What will be the amount (in Rs) after 2 years?

 

A)  6998.4 B) 6960
C) 6784.4 D) 6869.4
 
Answer & Explanation Answer: A)  6998.4

Explanation:
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1 698