1. A man travels 20 km on foot at 5 kmph and another 10 km by bus at 20 kmph. What is his average speed?
• a. 5 kmph
• b. 6 kmph
• c. 6.67 kmph
• d. 8 kmph

• Avg speed=Total Distance/Avg speed
  
  on feet=20/5=4
  by bus=10/20=.5
  
  avg speed=30/4.5=6.67 kmph
• 11 years agoHelpfull: Yes(18) No(3)
• d)8kmph
  average speed=(2*x*y)/(x+y)
• 11 years agoHelpfull: Yes(5) No(12)
• sorry avg speed=total distance/avg time..solution remains same
• 11 years agoHelpfull: Yes(4) No(4)
• the formula for average speed is (2*x*y)/(x+y)
  so (2*5kmph*20kmph)/(5kmph+20kmph)
  so avg speed is 8kmph
• 11 years agoHelpfull: Yes(3) No(4)
• Avg speed=Total Distance/Avg speed
  
  speed on feet=20/5=4
  speed by bus=10/20=.5
  hence avg speed is :- 4+.5
  avg speed=30/4.5=6.67 kmph
• 11 years agoHelpfull: Yes(3) No(1)
• total distance/ total time...answer will be 6.666666
• 11 years agoHelpfull: Yes(1) No(2)