X and Y are two towns. Ganesh covers the distance from X to Y at an average speed of 54 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 : Pick.
A) 34	B) 43.2	C) 40	D) 38	E) 29
Solution: Average speed = 2XY / X+Y   = 2*54*36 / 54+36   = 43.2   Answer : 43.2
<result>B</result>
X and Y are two towns. Ganesh covers the distance from X to Y at an average speed of 54 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 :