X and Y are two towns. Ganesh covers the distance from X to Y at an average speed of 60 Km/hr. However, he covers the distance from Y to X at an average speed of 36 Km/hr. His average speed during the whole journey in km/hr. is :
Answers:
A) 45  B) 43  C) 40  D) 38  E) 29

Rationale: solution : average speed = 2 xy / x + y = 2 * 60 * 36 / 60 + 36 = 45 answer : a
Answer: A