Question

A village have 4000 literate people in the year 2010 and this number increases by 400 per year how many literate people will be there till the year 2020 find the formula to know the number of literate people after n year

Answer 1

people/principal- 4000
rate- 400=400/4000*100
       -10%
time=10 years

Simple interest/ increased literate people- P*R*T/100
                         -4000*10*10/100
                         -4000

amount/ total literate people- 4000+4000
                                                - 8000