Ratio of initial investments =1∕2:1∕3:1∕4=6:4:3 Let their initial investments be 6x,4x and 3 x respectively. Also, Amitabh : Shatru : Shashi =[(6x×2)+(3x×10)]:[4x×12]:[3x×12] ⇒42:48:36 ⇒7:8:6 Sum of the ratio =7+8+6=21 So, Shatru's share =378×8∕21= Rs. 144 ∴ Shatru's share Rs. 144.