ratan would have reached 20mins early if he walks 5kmph from his home. if he walks 4kmph he reach office 40mins late. what is the distance between ratan home and office??
a)8
b)11
c)7
d)21
e)none

• dist=x, let time =t,
  x/5=t-20/60=t-1/3, like x/4=t-2/3 now 5(t-1/3)=4(t-2/3)
  we get 20 i think so ans is e
  
• 9 years agoHelpfull: Yes(5) No(3)
• daistance is same from home to office and officee to home..so we know D=S*T..
  (t-20)*5=(t+40)*4
  5t-100=4t+160
  t=260 min
  we want distance so 5*(260-20)/60=20km
  (OR)
  4*(260+40)/60=20km..
  so ans is (e)
• 8 years agoHelpfull: Yes(4) No(0)
• option (e)
• 9 years agoHelpfull: Yes(2) No(2)
• let the distance=x
  diff in time/60=x/4-x/5
  20/60=x/20
  x=7
• 9 years agoHelpfull: Yes(1) No(3)
• option(e)
  ratan walked 5kmph from his home and walked 4kmph more to reach his office
  5+4=9
• 9 years agoHelpfull: Yes(0) No(8)
• dist=x, let time =t,
  x/5=t-20/60=t-1/3, like x/4=t+2/3 now 5(t-1/3)=4(t+2/3)
  we get 21 , opt d .
  
• 8 years agoHelpfull: Yes(0) No(0)