Question 1
A car after travelling 18 km from a point A developed some problem in the engine and the speed became 4/5th of its original speed. As a result, the car reached point B 45 minutes late. If the engine had developed the same problem after travelling 30 km from A, the car would have reached B only 36 minutes late. The original speed of the car (in km per hour) and the distance between the points A and B (in km) are
