Refer to the data below and answer the questions that follow.
When BMW introduced its most advanced engine, it was found that the engine of the car followed certain mileage characteristics in a speed limit of 25 km/h to 80 km/h. The car can travel a distance of 15 km in one litre of petrol while speeding at 50 km/h. From this point onwards for every increase of 5 km/h in the speed of the car the mileage is increased by 1 km per litre. Similarly, for every decrease of 5 km/h in the the speed of the car, the mileage is decreased by 1 km per litre. Assume that the cars operate in this speed limit only.
Rahul Ghosh has filled exactly 10 litres of petrol in his car. He drives at a speed of 45 km/h for first two hours. What is the maximum distance that he can cover before his tank goes dry?