A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/hour more than the original speed. Total time taken to complete the journey is 3 hours. What is the original average speed of the train ?
A. 36 kmph
B. 42 kmph
C. 48 kmph
D. 54 kmph
Answer:B
A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/hour more than the original speed. Total time taken to complete the journey is 3 hours. What is the original average speed of the train ?
A. 36 kmph B. 42 kmph C. 48 kmph D. 54 kmph