if stallone had walked 20km/hr faster he would have saved 1hour in the distance of 600km.what is the usual speed of stallone?

• let his usual speed be x km/hr..
  so (600/x)- (600/(x+20))=1
  x^2+12x-12000=0
  (x-100)(x+120)=0
  so.his usual speed is 100km/hr.(as speed cannot be -ve)
  
• 12 years agoHelpfull: Yes(20) No(2)
• s=d/t
  20=600/t-1 (as one hour is saved)
  t=31hrs.
  s=d/t
  s=600/31
  s=19.35km/hr
• 12 years agoHelpfull: Yes(1) No(15)
• here d speed is given as 20km/hr
  so first find out d time=600/20=30hr
  he saved 1 hr so the usual time is 30+1=31
  now speed is 600/31=19.35km/hr
• 12 years agoHelpfull: Yes(1) No(4)
• @sabiha:
  x^2+12x-12000=0??????
  (600/x)-(600/(x+20))=1
  => x62+20x-1200=0
  check ur cal
• 12 years agoHelpfull: Yes(0) No(2)