If i walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hour late.Find the distance between 2 points and the exact time of reaching destination is 11 am then find the speed with which it walks.

• LET ORIGINAL SPEED BE V AND TIME TAKEN BE T...
  
  AS DISTANCE BETWEEN TWO POINTS IS CONSTANT,
  30*(T-1)=20*(T+1)=V*T
  
  HENCE, V=24MILE/HR
  T=5 HRS
  
  DISTANCE BETWEEN TWO POINTS IS 120 MILES
• 15 years agoHelpfull: Yes(40) No(14)
• Let us suppose actual time taken be ‘t’ hrs
  If speed= 30 miles/hr, t= (t-1)hr ==> d= 30(t-1) miles
  If speed = 20 miles/hr, t2=(t-1)hr ==> d= 20(t+1) miles
  Since dist is equal thru out the journey, equate both distances.
  i.e., 30(t-1)=20(t+1)  t= 5hrs…….. from this d=20(5+1)=120 miles
  And, speed= d/t = 120/5 = 24 miles
  
• 10 years agoHelpfull: Yes(21) No(2)
• Let us suppose actual time taken be ‘t’ hrs
  If speed= 30 miles/hr, t= (t-1)hr ==> d= 30(t-1) miles
  If speed = 20 miles/hr, t2=(t+1)hr ==> d= 20(t+1) miles
  Since dist is equal thru out the journey, equate both distances.
  i.e., 30(t-1)=20(t+1)  t= 5hrs…….. from this d=20(5+1)=120 miles
  And, speed= d/t = 120/5 = 24 miles/hr
• 10 years agoHelpfull: Yes(8) No(2)