Find average speed if a man travels at speed of 24kmph up and 36kmph down at an
altitude of 200m. Formula is 2xy/(x+y)

• 2*24*36/(24+36)=28.8 kmph
• 13 years agoHelpfull: Yes(13) No(0)
• The formula is given
  just substitute
  2*24*36/(24+36)
  1728/60 = 28.8
  The answer is 28.8kmph.
• 13 years agoHelpfull: Yes(8) No(1)
• total distance/total time =average speed
  2*200= 400m => total distance
  total time=distance/speed
  =(200/24)+(200/36)
  =13.88
  avg speed= 400/13.88
  =28.8kmph
• 10 years agoHelpfull: Yes(2) No(0)
• 2xy/(x+y)= 24*36/(24+36)=14.40
• 13 years agoHelpfull: Yes(1) No(12)
• 28
  
  take x=24 and y=36 and then substitute in above formula we can get ans as 28
• 13 years agoHelpfull: Yes(0) No(1)
• 24
  2xy/x+y=2*24*36/24+36=24
  
• 13 years agoHelpfull: Yes(0) No(1)
• average? 30
• 13 years agoHelpfull: Yes(0) No(9)
• when we cover the same distance at different speed the formula is 2xy/(x+y)where x any y are two different speeds
  2*24*36/(24+36)=28.8kmph
  and we have nothing to deal with altitude and it does not affect the solution in any way.
• 10 years agoHelpfull: Yes(0) No(0)