The cost of petrol was ₹400 per litre. If it increases by , then the revised cost would be ₹440 per litre.
Bilal has decided to buy a car. He has to choose between a diesel car and a petrol car. The diesel car costs Dhs12000 more than the petrol car. However, it can travel 13 kilometres per litre, whereas the petrol car can only travel 10 kilometres per litre. Also, diesel costs Dhs41.60 per litre, and petrol costs Dhs52.00 per litre. If he buys a diesel car, how far must he drive before the savings in fuel covers the extra price of the diesel car?