Batting first at the SCA Stadium in Khandheri after losing the toss, Himachal Pradesh compiled 243 for 8 in 50 overs. Skipper Rishi Dhawan was the top scorer, making an unbeaten 67 off 64 balls with seven hits to the fence.
Paras Dogra (41) and Prashant Chopra (39) were the other batsmen to show some resistance against UP bowlers. Spinner Piyush Chawla took three wickets, giving away 49 runs, while medium pacer Pravin Kumar bagged two for 37.
However, Dwivedi and Rinku then joined hands and got their team out of the troubled waters. The duo stamped their authority with some solid batting and added 152 runs for the unbroken fourth wicket.
Dwivedi made an unbeaten 104 runs, facing 127 balls, and hit 15 fours, while Rinku smashed six fours in his 74-ball 62. UP reached the victory target in 47.2 overs.
Uttar Pradesh now have 4 points, while Himachal Pradesh are yet to open their account.