one person traveled 4 laps with the speed of 10,20,40 ( or 30) and
60 kmph and what is the average speed.

• let distance covered in one lap be x
  therefore total distance covered= 4x
  t1= x/10
  t2= x/20
  t3=x/30
  t4=x/60
  total time= t1+t2+t3+t4= 0.2x
  avg speed= total distance covered/ total time taken=4x/0.2x= 20
• 10 years agoHelpfull: Yes(77) No(6)
• 30kmph
  10+20+30+60/4=120/4=30 kmph
• 10 years agoHelpfull: Yes(2) No(45)
• Let the lap be x km
  Time taken by him to cover 4x km
  =x/10 +x/20 +x/30 +x/60 hrs
  =12x/60 hrs
  =x/5 hrs
  Therefore average speed
  =4x divided by x/5
  =4x*5/x
  =20 kmph
  
• 9 years agoHelpfull: Yes(2) No(0)
• 23) focus on (17,23,31,?)
  17+6=23
  23+8=31
  31+10=41
  According to me this is bit easy
• 7 years agoHelpfull: Yes(0) No(0)