A train travels 125 km in 2.5 hours and 270 km in 3 hours.find the average speed of train. Choose the correct option:  A) 80 kmph  B) 60 kmph  C) 72 kmph  D) 90 kmph  E) none of these

Rationale: "as we know that speed = distance / time for average speed = total distance / total time taken thus , total distance = 125 + 270 = 395 km thus , total speed = 5.5 hrs or , average speed = 5 = 395 / 5.5 or , 72 kmph . answer : c"
Answer: C