A father is 30 years older than his son however he will be only thrice as old as the son after 5 years what is father's present age ?
(a) 40 yrs (b) 30 yrs (c) 50 yrs (d) none of these

• Son's age: x
  Father's age: x + 30
  
  In 5 years:
  Son's age: x + 5
  Father's age: x + 35
  
  In 5 years the father is thrice as old as his son so:
  3(x + 5) = x + 35
  x = 10
  
  Current father's age is 40.
• 11 years agoHelpfull: Yes(27) No(1)
• current age of father, f
  current age of son, s
  f=s+30
  f+5 = 3*(s+5)= 3s+15
  Solving two, f=40yrs
  ANSWER (a)
• 12 years agoHelpfull: Yes(11) No(0)
• let the father age be X and son age be Y
  given,
  Y=X-30---eq(1)
  (X+3)=3(Y+3)--eq(2)
  substitute eq(1) in eq(2) we gwt
  X+3=3(X-30+3)
  =>X+3=3(X-27)
  =>X+3=3X-81
  =>2X=84
  =>X=42 years
  hence answer is option d)none of these
• 12 years agoHelpfull: Yes(2) No(13)
• F-father present age
  S-son present age
  present:
  F=S+30
  after 5 years:
  F+5=3(S+5)
  solving
  F=40
  S=10
• 10 years agoHelpfull: Yes(1) No(0)
• x+35=3(x+5)
  age of father = x+30 = 40
• 9 years agoHelpfull: Yes(0) No(1)
• Father age =x+30
  Son age =x
  5 years later
  Father age= x+30+5=x+35
  Son age=x+5
  according to question
  x+35=3(x+5)
  x+35=3x+15
  x=10
  So father age is 10+30=40
  
  
• 9 years agoHelpfull: Yes(0) No(0)
• F= 30+S (GIVEN)
  
  AFTER 5 YEARS F:S = 3:1
  LET THE PRESENT AGES BE: F:S
  
  F+5 = 3
  ------ ----- - - - - (1)
  S+5 = 1
  BY SUBSTITUTING F=30+S IN EUATION (1) AND CROSS MULTIPLY
  35+S = 3S+15
  20 = 2S ---> S = 10
  SUBSTITUE IN EQUATION (GIVEN)
  F= 30+ 10
  WE CAN THAT PRESENT AGE OF FATHER IS 40 YEARS ,
  
  
  
• 8 years agoHelpfull: Yes(0) No(0)
• You can just skim through the answers..
  Given conditions:
  Present age of father=Thrice his son's age
  After 5 years,
  Father's age=3 times his son's.
  
  Substituting the given options,
  i)40(check for the above conditions specified.) it satisfies
  
  Answer->a)40 yrs
• 7 years agoHelpfull: Yes(0) No(0)
• son age=x
  fathers age=y=x+30
  now
  after five years from now
  y+5=3(x+5)
  from given equations
  put value of y in final equation
  x+30+5=3(x+5)
  x=10
  y=x+30=10+30=40
  
• 7 years agoHelpfull: Yes(0) No(0)
• Let ,
  Son age=s; ---
  Father age=s+30;--..-eq(1)
  Acc to qn ,in 5 years
  Son =x+5
  Father=x+35;
  
  Father is thrice as old as his son::
  3(x+5)=x+35
  after solving this,
  x=10
  
  now put x in eq (1)
  Father age=40
• 5 years agoHelpfull: Yes(0) No(0)