Chapter 6 | Compound Interest | Class-8 DAV Secondary Mathematics

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DAV SOLUTIONS CLASS 8 Secondary Mathematics || Compound Interest

Compound Interest|| Unit 6 Worksheet 4

1. The population of a town is increasing at the rate of 8% p.a. What will be the population of the town after 2 years if the present population is 12,500?

Chapter 6 | Compound Interest | Class-8 DAV Secondary Mathematics

2. Three years ago, the population of a town was 50,000. If the annual increase during three successive years was at the rate 4%. 5% and 4% p.a. respectively, find the present population.

3. The profits of a firm were ₹ 72,000 in the year 2005. During the next year, it increased by 7% and it decreased by 5% in the following year. What are the profits of the firm after 2 years?

4. The population of a town is 64,000. If the annual birth rate is 10.7% and the annual death rate is 3.2%, calculate the population after 3 years. (Hint: Net growth rate = (Birth rate — Death rate)%)

5. In a factory, the production of motor bikes was 40,000 in a particular year, which rose to 48,400 in 2 years. Find the rate of growth per annum, if it was uniform during 2 years.

6. Madhu bought a house for ₹ 1,31,25,000. If its value depreciates at the rate of 10% p.a., what will be its sale price after 3 years?

7. A builder employed 4,000 workers to work on a residential project. At the end of the first year, 10% workers were removed, at the end of the second year, 5% of those working at that time were retrenched. However, to complete the project in time, the number of workers was increased by 15% at the end of the third year. How many workers were working during the fourth year?