Question : If the annual rate of simple interest increases from $11\%$ to $17 \frac{1}{2} \%$, then a person's yearly income increases by INR 1,071.20. The simple interest (in INR) on the same sum at 10% for 5 years is:

Option 1: 16,480

Option 2: 9,120

Option 3: 8,240

Option 4: 7,250

Question : John invested a sum of money at an annual simple interest rate of 10%. At the end of four years, the amount invested plus interest earned is Rs. 770. The amount invested was:

Option 1: Rs. 650

Option 2: Rs. 350

Option 3: Rs. 550

Option 4: Rs. 500

Question : A person invested Rs. 12,000 on simple interest for 7 years to obtain a total amount of Rs. 20,400 on a certain annual rate of interest. What was the rate of interest to obtain the above amount?

Option 1: 7%

Option 2: 9%

Option 3: 8%

Option 4: 10%

Question : The simple interest on a sum of money for 3 years is Rs. 240 and the compound interest on the same sum at the same rate for 2 years is Rs. 170. The rate of interest is:

Option 1: $8$%

Option 2: $29\frac{1}{6}$%

Option 3: $12\frac{1}{2}$%

Option 4: $5\frac{5}{17}$%

Question : A certain amount of money earns Rs. 540 as a simple interest in 3 years. If it earns a compound interest of Rs. 376.20 at the same rate of interest in 2 years, find the amount (in Rs.):

Option 1: Rs. 1600

Option 2: Rs. 1800

Option 3: Rs. 2000

Option 4: Rs. 2100