Question

a sum of 1000 ₹ is invested of at 8% simple interest per year calculate the interest at the end of each year do this interests for 1st 2nd and 3rd years from an AP if so find the total interest to be paid for 30years making the use of this fact​

Answer 1

Answer:

given,

    principal=1000

     rate of interest=8%

       number of years=1 year

      SI=Pnr/100=1000x1x8/100=rs.80

when n=2 years,SI=1000x2x8/100=rs.160

when n=3years,SI=1000x3x8/100=rs.240

the sequence is 

     80,160,240,..........

this is in AP as a,first term=80,d,common difference=80

interest at the end of 30 years,t30=a+(n-1)   =80+(30-1)80

 =80+29(80

 =80+2320

 =2400