New Zealand crushed Bangladesh by 75 runs in a World Twenty20 Group Two match at Eden Gardens on Saturday to maintain their 100 percent record and ensure their opponents exited the tournament without a win in the Super 10 stage. Kiwis won the toss, with skipper Kane Williamson scoring 42 off 32 deliveries to guide them to 145-8, before New Zealand, led by Grant Elliot and Ish Sodhi, bowled out Bangladesh for 70 in the 16th over. Earlier, New Zealand skipper Kane Williamson won the toss and opted to bat, but paceman Mustafizur Rahman took five wickets for 22 runs, including two in the final over, on a very dry pitch in Kolkata. Rahman made sure New Zealand did not get off to a good start when he bowled Henry Nicholls for seven in his first over. Nicholls, back in the side in place off the injured Martin Guptill, opened with Williamson, who was the pick of the New Zealand batsmen, hitting five fours and a six in his 42 off 32 balls, before he too was bowled by Rahman. The 20-year-old was indebted to a stunning catch by Shuvagata Hom for the wicket of Grant Elliott on nine, and he struck twice more off consecutive deliveries in the last over to bowl Mitchell Santner and Nathan McCullum for a golden duck. Al-Amin Hossian broke through New Zealand's middle order, bowling the dangerous Colin Munro for 35 and picking up the wicket of Ross Taylor for 28. Bangladesh skipper Mashrafe Mortaza bowled the big-hitting Corey Anderson for a duck.