Tata Motors, India's top vehicle maker launches the Nano, the world's cheapest car,on monday 23 march. The ex-factory price of the car is 100,000 rupees but to drive one out of the showroom, customers will have to add dealer charges and taxes, taking the on-the-road price up to 130,000 rupees. Buyers can also pay for extras such as air conditioning.Read more for answers of frequently asked questions.