New Delhi, Jan. 25 -- A belligerent 27-ball 53 (2X4, 6X6) from skipper Ayush Mhatre and a four-wicket haul from pacer RS Ambrish meant India steamrolled New Zealand by seven wickets - with 141 balls remaining - in their final group encounter and cruised into the Super Six stage of the U-19 World Cup in Bulawayo on Saturday. Reduced to 37-overs-a-side after a second rain interruption in the eighth over of the match, India bundled out the Kiwis for 135 in 36.2 overs before Mhatre put on a six-hitting masterclass to ensure India's smooth passage. With no pressure of the asking rate, Mhatre who had been short of run of late, drove with conviction and pulled with authority and raced to his half century off 24 balls with back-to-back sixes off finger spinner Selwin Sanjay. India lost opener Aaron George in the second over, but Mhatre and Vaibhav Sooryavanshi (40 off 23 balls; 2X4, 3X6) put the New Zealand bowling to sword. India hammered eight sixes in the eight-over powerplay to put the chase firmly on course; by contrast, New Zealand managed just six boundaries throughout their innings. Mhatre was quick to judge the length and had no problem in pulling off either foot. Even the short of length deliveries were smashed in the arc between deep midwicket and square leg, and whenever the bowlers overcompensated with length, the Mumbai right-hander was happy to drive. The fifty ended Mhatre's barren run of nine innings that contained four single-digit scores....