**Ravi lent out Rs.9600 at 8.5% per annum for a year 2 years 6 months.At the end of the duration,what amount he earned ?**

A)2000

B)2040

C)4020

D)1200**A sum of Rs.12,500 to Rs.15,000 in 2 years,find the rate of interest?**

A)12%

B)16%

C)10%

D)None of these**A sum of money amounts to Rs. 8400 after 3 years and Rs. 12000 after 6 years at the same rate of simple interest. The rate of interest per annum is**

A)25%

B)20%

C)52%

D)15%**A certain amount of simple interest of Rs. 2500 after 5 years. Had the interest increased 2% more,what is SI now?(Assume P= 10,000)**

A)2500

B)3000

C)3500

D)None of these**What will be the ratio of simple interest earned by certain amount at the same rate for 4 years and 12years?**

A)1:4

B)1:2

C)3:1

D)1:3**At what percentage of simple interest ,sum of money will double itself in 7 years?**

A)14%

B)13%

C)14(2/7)%

D)14(7/2)%**Sankar borrowed some money at the rate of 4% pa for the first 4 years,6% for the next 3 years and 7% for the next 10 years.If the total interest paid by him is Rs.8528,how much money did he borrow?**

A)8200

B)8328

C)16728

D)None of these**A sum of money trebles itself in 16 years.In how many years it would become double itself in how many years?**

A)4

B)5

C)8

D)8.5**Babu takes a loan Rs.2000 at 5% simple interest.He returns Rs.1000 at the end of 1 year.How much amount he should pay to clear the due in 2 years.**

A)1000

B)1150

C)2150

D)None of these**If the annual rate of simple interest increases from 10% to 12(1/2)%,annual income increases by 2500 then the principal(Rs)**

A)1,00,000

B)10,000

C)1,25,000

D)1,02,500