The interest for the 3rd year on a certain sum at a certain rate of simple interest is Rs.3000. find the sum of the interests accrued on it in the 6th, 7th and 8th years.
Simple interest is always calculated on principal. Therefore it is always equal for all years
Interest = 3rd year = 3000
So interest for the 6th, 7th and 8th year is = 3000 + 3000+ 3000 = 9000 Rs.