Kalpana Pathak / Mumbai December 30, 2009, 0:06 IST People will have to pay 50p-Re 1 more per litre of petrol and diesel when 11 cities in India move to the Euro IV emission norm, and the rest of the country to Euro III, in April 2010. State-run oil marketing companies (OMCs) say they have approached the government to increase the fuel prices. In April 2005, Delhi, Mumbai, Hyderabad, Kolkata, Chennai and Agra moved to Euro III at an additional cost of 30 paise per litre of petrol and 24 paise for diesel. Petrol currently costs Rs 44.63 a litre in Delhi and Rs 48.76 in Mumbai. Diesel costs Rs 32.87 in Delhi and Rs 36.07 in Mumbai.