A beats B in a 100 race by 10m . B beats C in the same race by 10m. Then by how much does A beat C in the same race.

• A beats B by 10m .
  So when A covers 100m B covers only 90m. Ratio of speed of A and B is 10:9
  Similarly ratio of speed of B : C = 10 : 9
  
  So , speed ratio of A:B:C = 100 : 90 : 81
  
  So when A covers 100m then C covers 81m
  
  So A beats C by 19m.
• 11 years agoHelpfull: Yes(12) No(3)
• Ans: 20
  Exp: a 2 b by 10 & b 2 c by 10 m
  after all a beats 2 c =10+10 =20 m
• 11 years agoHelpfull: Yes(2) No(7)
• A:B=100:90since when a runs 10 m b runs 90 m thus a:b=10:9;
  B:C=100:90 ;b:c=10:9;
  by ratio a:b:c=10*10;10*9;9*9
  100:90:81
  so when a covers 100m c covers 81 m
  when a covers 1 m covers 81/100
  81/100*100=81
  100-81=19m
  
• 8 years agoHelpfull: Yes(0) No(0)