Correct Answer - Option 2 : 142 Kg
Six boxes: P, Q, R, S, T, and U
1. Weight of box R is more than box T but not more than box U and S.
U/S > R > T
2. Weight of box Q is more than box P and box T but not more than box U.
3. Weight of box U is greater than box S.
U > Q/S > P/T
4. Weight of box P is more than box R but not more than box S.
S > P > R
5. Weight of S is 76 Kg and weight of the one whose weight is fourth highest is 64 Kg
So, the final arrangement is:
U > S(76 Kg)/Q > Q/S(76 Kg) > P (64) > R > T
So, P + Q = 130, and box P Weight is 64 Kg.
Therefore Weight of box Q is 66 Kg and also the weight of box S is 76 Kg.
Hence, the weight of box Q and box S is 142 Kg.