simple interest

Rohit Arora (IPCC, b.com(h)) (190 Points)

07 June 2011  

hi, pls solve this question.......thanks in advance

peter invested an amount of  rs.12000 at the rate of 10p.c.p.a and another amount atthe rate of 20p.c.p.a.simple interest.

the total interest earned at the end of the year on the total amount invested became 14p.c.p.a.

find the total amount invested..................................................?pls help