find the average speed if a man travles at speed 24kmph up and 36kmph down at an altitude of 200m?

a) 28.8 mph b)27.8mph c)27.5mph d)30mph

• ans is 28.8 mph
  as avg speed is given by (2*24*36)/(24+36) = 28.8 mph.
• 12 years agoHelpfull: Yes(26) No(1)
• a=24kmph
  b=36kmph
  avegage speed=2ab/(a+b)
  altitude has nothing to do with average speed,.,its there to create confusion
• 12 years agoHelpfull: Yes(10) No(1)
• ans should be 288m/ph
  2*24000*36000/60000=288 mph
  @satish-u forget t change kmph to mph
• 12 years agoHelpfull: Yes(3) No(1)