Question

If Rs. 1,000 be invested at interest rate of 5% and the interest be added to the principal
every 10 years then the number of years in which it will amount to Rs. 2,000 is:​

Answer 1

IOyrs.interest=1000x10x5/100=5oo

P = 1000+500 =1500

N=100x500/l5oox5=

6 2/3 yrs

Total 16 2/3 yrs. The amount will be

Rs.2ooo

Answer 2

Answer:

After 10 year

SI= PNR/100

= 1000*5*10/100

=500

Principal for 11th year= 1000+500

=1500

T= SI*100/P*R

= 500*1000/1500*5

= 20/3

= 6 2/3

Total time = 10+ 6 2/3

= 16 2/3