Bissoy.com
Doctors Medicines MCQs Q&A

The population of a town increases at the rate of 10% per annum. If the present population of the town is 266200, then what was the population 3 years ago?

The population of a town increases at the rate of 10% per annum. If the present population of the town is 266200, then what was the population 3 years ago? Correct Answer 200000

Let,

Population 3 years ago = x

Increase in population per annum = 10%

⇒ Population after 3 year = (1.10) (1.10) (1.10) x = 1.331x

Population after 3 year = 266200

⇒ 1.331x = 266200

∴ x = 266200 /1.331 = 200000

Related Questions

Ms. Rahena needs to get from Town C. The only was to get Town C is taka a bus from Town A to Town B and then take a train from Town B to C. The bus leaves Town A at 8.00 am and reaches Town b after 212 hours. The first train leaves Town B at 9.00 am and then there is a train every 50 minutes. The train reaches Town C 40 minutes after its departure . If Ms. Rehana leaves Town A at 8.00 am, When is the earliest she would arrive at Town C?
Given below are three quantities named 1, 2 and 3. Based on the given information, you have to determine the relation among the three quantities. You should use the given data and knowledge of Mathematics to choose between the possible answer. The options represent the relations among three quantities. A. < B. > C. ≤ D. ≥ E. = Quantity 1: Sumit invested Rs. X for 2 years at the rate of R% per annum simple interest. The interest obtained is Rs. 450 less than the interest obtained when the same sum is invested for 2 years at the rate of (R + 9)% per annum simple interest. Find the value of X. Quantity 2: Ankit invested Rs. Y for 2 years at the rate of 10% per annum compounded annually. The interest obtained is 795 less than the compound interest received by him when he invested a sum of Rs. 3000 for 2 years at the rate of 20% per annum compounded annually. Find the value of Y. Quantity 3: Difference of CI and SI obtained on a sum of Rs. Z when invested for 2 years at 10% per annum is Rs. 20. Find the value of Z. 
Given below are quantities named A,B and C. Based on the given information, you have to determine the relation between the quantities. You should use the given data and your knowledge of mathematics to choose among the possible answer. Akash’s present age is six years less than Badshah’s age after nine years. The ratio of present age of Badshahand RAFTAAR is 5:9. Raftaar is 21 years younger than Denny and Denny is three years older than Honey. Square of the Honey’s present age is 1350 more than 15 times of Honey’s present age? Quantity A: What is the difference between AKASH’s present age and HONEY’s age after 16 years? Quantity B: After 6 years Mankirat’s age is twice that of Akash’s present age. Diljeet’s present age is 3.5 times of 25% of sum of present age of Mankirat and A. What is the present age of Diljeet? Quantity C: Twice of A’s present age is eight years more than that of Babbu’spresent age, then find the Babbu’s present age?
The population of a town increases at a rate of 8% per annum. If the population of the town after 3 years will be 80812, what is the population of the town 2 years ago?
The population of a town increases at the rate of 10% per annum. If the present population of town is 12100, then what was the population 2 years ago?
The population of a town increases at the rate of 15% per annum. If the present population is 108445 of town, then what was the population 2 years ago?
A person has Rs. 30000 and he invested in four schemes. In 1st scheme he invested 10% of the sum at the rate of 20% per annum, while in 2nd scheme he invested 12% of the amount at the rate of 10% per annum, while in 3rd scheme he invested 25% at the rate of 20% per annum, while in 4th scheme he invested remaining amount at the rate of 25% per annum. After 2 years what is the total amount received by the person.
Questions below followed by three quantities. Find the relationship between them. Quantity I: Peter invested Rs. P in a scheme A offering simple interest at 12% per annum for five years. He invested the whole amount he received from scheme A in another scheme B offering simple interest at 5% per annum for 4 years, if the difference between the interests earned from scheme A and B was Rs. 2240. What is the value of P? Quantity II: Mohan deposited Rs. 12000 at simple interest which amounted to Rs. 16800 after 4 years . Had the interest been 5% more, how much amount he would have got? Quantity III: The SI on certain sum of money for 18 months at the rate of 8% per annum exceeds the SI on the same sum at 10% per annum for 12 months by Rs. 200. Then find the sum?
A bank offers following 4 schemes for investment. If a customer wants to invest an amount of Rs. P,  then which scheme is more beneficial for a customer after a period of 1 year?  I. Rate of invest 24% per annum compounded quarterly  II. Rate of interest 24% per annum compounded half-yearly  III. Rate of interest 24% per annum compounded annually  IV. Rate of interest 24% per annum with simple interest 
The population of the town increases at the rate of 17% per year, If the population of the town after two years will be 616005, then what is the present population of the town?