Approach to Solve Depreciation Rate Based Questions

Q. Sameera spent 90% of her income and donated 3% for socially useful causes. If she left with Rs. 1750 at the end of the month, what was her actual income ?

Q.

Calculate the compound interest accrued on Rs. 6, 000 in 3 years, compounded yearly, if the rates for the successive years are 5%, 8% and 10% respectively.

Q.

The value of machinery is Rs.20000. The value is depreciating by 10% every year. What will be the value of the machinery after 3 years?

1. Rs. 16580

2. Rs. 14500

3. Rs. 14580

4. Rs. 15580

Q. The price of a car depreciates every year by 10%. What was its value 3 years ago, if its present value is Rs 36, 450?

1. Rs 45, 000
2. Rs 49, 500
3. Rs 55, 000
4. Rs 50, 000

Q. How 5%=1.05

Q. Total income of Ramesh, Suresh and Preeti is 8, 07, 000 rupees. The percentages of their expenses are 75%, 80% and 90% respectively. If the ratio of their savings is 16 : 17 : 12, then find the annual saving of each of them.

Q.

The population of a town was 160000 three years ago. If it had increased by 3%, 2.5% & 5% in the last 3 years, find the present population of the town.

1. 170000

2. 277366

3. 200000

4. 177366

Q.

A machine was purchased 2 years ago. Its value decreases by 10 % every year. Its present value is ₹ 97200. Find the purchase price of the machine

1. ₹ 90, 000

2. ₹ 1, 10, 000

3. ₹ 1, 20, 000

4. 1, 00, 000

Q.

Mr. Tiwari receives Rs 6455 at the end of one year at the rate of 14% per annum in a recurring deposit account. What is his monthly installment?

1. Rs 400

2. Rs 700

3. Rs 800

4. Rs 500

Q. The present population of a town is 20, 0000 it's population increases by 10% in the first year and 15% in second year find the population of the town at the end of the two years .

I have solved this question my answer is 253000 but in the book the answer is 25300.
Kindly solve this query.

Q.

The value of a property decrease every year at the rate of 5% . if the present value is ₹411540 what was its value 3 years ago

Q.

The population of a town is 50, 000. It decreases by 50 per thousand per year. Find out the population after 2 years.

1. 45000

2. 42125

3. 45125

4. 42000

Q. Mr Gupta opened a recurring deposit account in a bank. He deposited Rs 2500 per month for month for two years. At the time of maturity, he got Rs 67, 500.
Find :(i) The total interest earned by Mr Gupta.
(ii) The rate of interest per annum
[4 MARKS]

Q.

Calculate the amount, if Rs. 15, 000 is lent at convound interest for 2 years and the rates for the successive years are 8% p.a. and 10% p.a. respectively.

Q.

The difference in SI and CI on a certain sum of money in 2 years at $15\%p.a.$ is Rs. 144. The sum is :

1. Rs. 7000

2. Rs. 6000

3. Rs. 6500

4. Rs. 6400

Q.

Question 39

The loss per cent on selling 140 geometry boxes at the loss of SP of 10 geometry boxes is equal to ___.

Q.

increasing a number by 100% is the same as

A) MULTIPLYING IT TO THE NUMBER ITSELF

B) MULTIPLYING THE NUMBER BY 2

C) ADDING 2 TO THE NUMBER

D) ADDING 100 TO THE NUMBER

Q.

Mr Britto deposits a certain sum of money each month in a Recurring Deposit Account of a bank. If the rate of interest is 8% per annum and Mr Britto gets Rs. 8, 088 from the bank after 3 years, find the value of his monthly installment.

1. Rs 200
2. Rs 100
3. Rs 350
4. Rs 500

Q.

Find the percent increase in the area of a triangle if its each side is doubled

Q.

If 40 bags of cotton costs Rs.2200 then how much would 25 bags of cotton cost?

1. Rs 2183

2. Rs 2173

3. Rs 3173

4. Rs 3183

Q. The cost of a machine depreciates by 10% every year. If its present worth is Rs. 18, 000 then what will be its value after three years?

Q. The value of a machine depreciated by 10% per year during the first two years and 15% per year during the third year. Express the total depreciation of the machine, as percent, during the three years (Solve without using compound interest formula).

Q.

The value of machinery is Rs.10000. The value is depreciating by 15% every year. What will be the value of the machinery after 2 years?

1. 5225

2. 9225

3. 8225

4. 7225

Q. By mistake instead of dividing Rs. $117$ among $A,B$ and $C$ into the ratio $\frac{1}{2}:\frac{1}{3}:\frac{1}{4}$ , it was divided in the ratio of $2:3:4$ . Who gains the most and by how much?

1. $B,Rs.3$
2. $C,Rs.25$
3. $C,Rs.20$
4. $A,Rs.28$

Q.

If the sides of a TRIANGLE are doubled find the percent increase in area

Q.

A man sold two watches for Rs 3750 each. On one he gained 5%, and on the other, he lost 5%. What was his total gain or loss percentage?

1. 0.25%

2. $\frac{1}{2}$%

3. $\frac{1}{4}\%$

4. Insufficient data

Q.

A man spends 80% of his income. His income increased by 25% and his expenditure increased by

10%. By how much did his savings increase?

Q. A person sells 36 oranges per Re 1 and makes a loss of 4%. Find how many oranges per Re to be sold to have a gain of 8%?

1. $\frac{1}{32}$
   
2. 5
   
3. $\frac{1}{16}$
   
4. $\frac{1}{16}$
5. None of these

Q.

The value of machinery is Rs.10000. The value is depreciating by 15% every year. What will be the value of the machinery after 2 years?

1. 8225

2. 7225

3. 9225

4. 5225

Q.

Find the percentage increse in the area of a triangle if its each side is doubled.PLEASE GIVE SIMPLE EXPLANATION AND HOW IT CAME IN BRACKET.