Question : What will a person get after 3 years at compound interest, when the principal is Rs. $S$ and the rate of interest is $2r$% per annum?

Option 1: Rs. $\frac{6Sr}{100}$

Option 2: Rs. $S(1+\frac{r}{100} )^{3}$

Option 3: Rs. $S( 1+\frac{r}{50} )^{3}$

Option 4: Rs. $3S( 1+\frac{r}{100} )^{3}$

Question : In how many years will a sum of Rs. 3000 yield an interest of Rs.1080 at 12% per annum simple interest?

Option 1: $4$ years

Option 2: $3$ years

Option 3: $5$ years

Option 4: $2\frac{1}{2}$ years

Question : What is the rate of interest per annum for simple interest at which Rs. 880 amounts to Rs. 913 in $1 \frac{1}{2}$ years?

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

Option 2: $2 \frac{1}{4}$%

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

Option 4: $2 \frac{1}{3}$%

Question : The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:

Option 1: Rs. 520

Option 2: Rs. 550

Option 3: Rs. 500

Option 4: Rs. 515

Question : The simple interest on Rs. 800 for 6 years at 5.5% per annum is equal to the simple interest on Rs. 600 at 4% per annum for a certain period. The period is:

Option 1: 11 years

Option 2: 9 years

Option 3: 12 years

Option 4: 10 years