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 2 : 3? Choose the correct choice
A) 70 kmph B) 50 kmph C) 57 kmph D) 54 kmph E) 70 kmph
Let the distances between city A to B and B to C be 2x km and 3x km respectively.   Total time taken to cover from A to C   = (2x)/40 + (3x)/60   = (6x + 6x)/120 = 12x/120   = x/10 Average speed   = (2x + 3x)/(x/10) = 50 kmph.   Answer: 50 kmph
<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 2 : 3?