X and Y are two towns. Ganesh covers the distance from X to Y at an average speed of 43 Km/hr. However, he covers the distance from Y to X at an average speed of 34 Km/hr. His average speed during the whole journey in km/hr. is :	Choose the correct option:
A) 34  B) 43  C) 40  D) 38  E) 29
Solution: Average speed = 2XY / X+Y   = 2*43*34 / 43+34   = 2924 / 77   = 37.974... = 38   Answer : 38
<result>D</result>
X and Y are two towns. Ganesh covers the distance from X to Y at an average speed of 43 Km/hr. However, he covers the distance from Y to X at an average speed of 34 Km/hr. His average speed during the whole journey in km/hr. is :