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 : 5?
A. 48 kmph  Choose the correct choice from the following answers:
A) 33 B) 52.5 C) 28 D) 27 E) 16.6
Let the distances between city A to B and B to C be 2x km and 5x km respectively.   Total time taken to cover from A to C   = (2x)/40 + (5x)/60 = (6x + 10x)/120 = 16x/120 Average speed = (2x + 5x)/(16x/120) = 52.5 kmph.   Answer: 52.5(2  + 5 )/(16 /120)= 
<gadget id="calculator">(2  + 5 )/(16 /120)</gadget>
<output>105/2 = around 52.5</output>
52.5 kmph.   Answer: 52.5
<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 : 5?
A. 48 kmph