Amount invested by S, T and U = Rs. 4200, Rs. 6300 and Rs. 8400 ⇒ Ratio of amount = S:T:U=2:3:4 Also, S invested for 3 months, T for 6 months and U for 12 months ⇒ Ratio of profits of S, T and U = (2×3)+(3×6)+(4×12) = 1 : 3 : 8 Total profit = Rs. 6000 ∴ U's share =