Murali travelled from city A to city B at a speed of 40 kmph and from city B to city C at 60 kmph. What is the average speed of Murali from A to C given that the ratio of distances between A to B and B to C is 1 : 2?
A. 48 kmph  Choose the correct choice:
A) 33
B) 360/7
C) 28
D) 27/8
E) 16
Let the distances between city A to B and B to C be x km and 2x km respectively.   Total time taken to cover from A to C   = (x)/40 + (2x)/60 = (3x + 4x)/120 = 7x/120 Average speed = (x + 2x)/(7x/120) = 360/7 kmph.   Answer: 360/7
<result>B</result>
Murali travelled from city A to city B at a speed of 40 kmph and from city B to city C at 60 kmph. What is the average speed of Murali from A to C given that the ratio of distances between A to B and B to C is 1 : 2?
A. 48 kmph