The Virat Kohli led side will meet Yuvraj Singh's India 'Blue' in the final of the tournament.
Courtesy Unmukt's 119 and skipper Virat Kohli's useful 63, Delhi piled up a huge total of 342 for six in 50 overs after being put into bat. Milind Kumar with 52-ball-57 and Rajat Bhatia with an unbeaten 19-ball-40 also beefed up the score in the end.
While veteran seamer Ashish Nehra (4/38) provided early breakthroughs, left-arm spinner Varun Sood (5/84) took vital wickets in the middle-order.
The day belonged 20-year-old Unmukt who faced 131 balls hitting 12 boundaries and three sixes.
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Senior pro Virender Sehwag (8) failed today while Gautam Gambhir (20) continued from his woeful form in county circuit.
However Virat Kohli was in his fluent self as he hit 63 off only 55 balls with five fours and two sixes -- one each of off-spinner Yusuf Pathan and left-arm spinner Shahbaz Nadeem.
Sandeep Warrier who bowled to a tight line initially wasn't spared either as he was slashed over extra cover for a six.