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 : 3?
A. 48 kmph
Choose the correct answer
A) 33
B) 480/9
C) 28
D) 27/8
E) 16
Let the distances between city A to B and B to C be x km and 3x km respectively.   Total time taken to cover from A to C   = (x)/40 + (3x)/60 = (3x + 6x)/120 = 9x/120 Average speed = (x + 3x)/(9x/120) = 480/9 kmph.   Answer: 480/9
<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 : 3?
A. 48 kmph