21). A sum invested for 3 yr compounded at 5%, 10% and 20% respectively. In 3 yr, if the sum amounts to RS. 16632, then find the sum.
| A). RS.11000 |
| B). RS.12000 |
| C). RS.9000 |
| D). RS.15000 |
|
22). The simple interest on a certain sum for 2 yr is RS. 120 and compound interest is RS. 129. Find the rate of interest.
| A). 14% |
| B). 15% |
| C). 12% |
| D). \( \Large 12\frac{1}{2}% \) |
|
23). The height of a tree increases every year 1/8 times. If the present height of the tree is 64 cm, then what will be its height after 2 yr?
| A). 76 cm |
| B). 80 cm |
| C). 81 cm |
| D). 84 cm |
|
24). The principal amount which yields a compound interest of RS. 208 in the second year at 4% is
| A). RS.5000 |
| B). RS.10000 |
| C). RS.130000 |
| D). RS.6500 |
|
25). The population of a town is 126800. It increases by 15% in the first year and decreases by 20% in the second year. What is the population of the town at the end of 2 yr?
| A). 174984 |
| B). 135996 |
| C). 116656 |
| D). 145820 |
|
26). SBI lent RS. 1331 lakh to the TATA group at compound interest and got RS. 1728 lakh after 3 yr. What is the rate of interest charged, if compounded annually?
| A). 11% |
| B). 9.09% |
| C). 12% |
| D). 8.33% |
|
27). An amount is invested in a bank at compound rate of interest. The total amount, including interest, after first and third year is RS. 1200 and RS.1587, respectively. What is the rate of interest ?
| A). 10% |
| B). 3.9% |
| C). 12% |
| D). 15% |
|
28). A sum of RS. 11000 was taken as loan. This is to be paid in two equal annual instalments.If the rate of interest be 20% compounded annually, then the value of each instalment is
| A). RS.7500 |
| B). RS.7000 |
| C). RS.7100 |
| D). RS.7200 |
|
29). During the first year, the population of a Village is increased by 5% and the second year, it is diminished by 5%. At the end of the second year. its population was 47880. What was the population at the beginning of the first year?
| A). 45500 |
| B). 48000 |
| C). 43500 |
| D). 53000 |
|
