Question

Simple interest on a sum for 10 years is equal to 5% of the principal. In how many years interest will be equal to the principal?

Answer 1

. 1,000 is invested at 5% per annum simple interest. If the interest is added to the principal after every 10 years, the amount will become R

Answer 2

let p be the sum and x be rate of interest.

si=p*10*x/100

given Simple interest on a sum for 10 years is equal to 5% of the principal i.e., si=5/100(p)

10px/100=1/20p

from this we gert x=0.5 i.e., rate of interset.

now time taken to interset to get equal to principle is

si=p*t*0.5/100

p=p*t*0.5/100

from this we get t=200