Question

Mr amit invested rs 60,000 partly at 3 percent per annum and the remaining at 4 percent per annum . the total interest received after one year is rs 2,200. find how much was invested at each rate

Answer 1

let Y rup invested at 3% per annum.
then 60000-Y rup invested at 4% per annum.
2200= Y x 1 x 3/100 + 60000-Y x 1 x 4/100
2200= 3Y/100+ 240000-4Y/100
2200= 3Y+240000-4Y/100
2200= 240000-Y/100
220000= 240000-Y
Y= 240000-220000
Y= 20,000 rup
at 3% rate invested 20,000 rup
and 4% rate invested 40,000 rup Ans