প্রশ্ন সংশোধন করুন
প্রশ্ন:
A train went 300 miles from City X to City Y at an average speed of 100 mph. At what speed did it travel on the way back if its average speed for the whole trip was 120 mph?
A train went 300 miles from City X to City Y at an average speed of 100 mph. At what speed did it travel on the way back if its average speed for the whole trip was 120 mph?