Petrol and diesel prices were reduced by 14-15 paise per litre across Delhi, Kolkata, Mumbai and Chennai on Monday. While petrol prices were cut for the sixth day in a row, diesel prices were lowered for five days in six. In six days, petrol prices have been lowered by 47 paise per litre in Delhi and Mumbai, 46 paise per litre in Kolkata and 49 paise per litre in Chennai, data from Indian Oil Corporation shows. Diesel prices have come down by 34 paise per litre in Delhi and Kolkata, and 36 paise per litre in Mumbai and Chennai.