Stidents of a Dahanu-based academy have modified a bicycle into an 80cc nano bike, which can run both on petrol and human effort. Five students - Shubham Chavan, Prathamesh Das, Anal Patel, Ketan Chaudhary and Omkar Kadam - pursuing a diploma course in automobile engineering at the Rustomjee Academy for Global Careers built the bike as part of their college project, within 15 days. Vinod Shinde, senior faculty of the academy, said the bike has been fitted with a small petrol tank and a semi-pedal switch to start the vehicle.