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 4 : 2?  Answers: A) 16 B) 45 C) 277 D) 92 E) 11
Let the distances between city A to B and B to C be 4x km and 2x km respectively.   Total time taken to cover from A to C   = (4x)/40 + (2x)/60 = (4x + 12x)/120 = 16x/120 = 2x/15 Average speed = (4x + 2x)/(x/10) = 45 kmph.   Answer:45
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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 4 : 2?