Let their initial investments be Rs 5x, Rs 4x and Rs 3x respectively,
Then
⇒(5x+36):[(4x×12)+(4x×5,400)×12]
[(3x×24)+(3x+5,400)×12]=7:8:6
=1,440x=1,008x+9,07,200432x=9,07,200x=2,100The initial investment of Raghu, Mani and Gurpreet is (4 × 2,100) and (3 × 2,100) respectively.
Hence, initial investment of each is Rs 10,500, Rs 8400 and Rs 6300