A passenger train takes two hours less for a journey of 300km if its speed is increased by 5km/hr from its normal speed. The normal speed is:
A.35 km/hr
B.50 km/hr
C.25 km/hr
D.30 km/hr
E. 37Km/hr

• @DEVENDRA MARGHADE ur soln is wrong.. its 2 hours not 5
  
  Corrected soln:
  Ans: 25 km/hr
  
  Let the normal speed be x km/hr, then
  Difference between the time taken to cover 300 km at the rate of 'x' and 'x+5' is 2 hours
  So, [(300/x) - 300/(x+5)]=2
  => (300x+1500-300x)/x(x+5) =2
  => x^2+ 5x -750=0
  => (x-25)(x+30)=0
  => x=25
• 7 years agoHelpfull: Yes(22) No(1)
• Ans: 15 km/hr
  
  Let the normal speed be x km/hr, then
  Difference between the time taken to cover 300 km at the rate of 'x' and 'x+5' is 5 hours
  So, [(300/x) - 300/(x+5)]=5
  => (300x+1500-300x)/x(x+5) =5
  => x^2+ 5x -300=0
  => (x-15)(x+20)=0
  => x=15
• 7 years agoHelpfull: Yes(0) No(15)
• Let the normal speed be x km/hr
  time=distance/speed
  300/x=2+(300/(x+5))
• 5 years agoHelpfull: Yes(0) No(0)
• (300/x-5)- (300/x)=2; where x is normal speed it will come out to be 30km/hr
• 5 years agoHelpfull: Yes(0) No(0)