Fathers age is 5 times his son's age. 4 years back the father was 9 times older than son.Find the fathers' present age.

(a) 41
(b) 40
(c) 39
(d) 45

• fathers age =x sons age =y
  x=5y;x-4=9(y-4)
  5y-4=9y-36
  y=8 so x=40
• 8 years agoHelpfull: Yes(34) No(1)
• Let's son age=x
  Father's age is five times of son=5x
  Fours years back,
  Son=x-4
  Father=5x-4
  Given in qstn
  F=9(x-4)
  5x-4=9x-36
  X=8
  Therefore father's age=5*8=40
• 8 years agoHelpfull: Yes(10) No(0)
• let son's age is "x" and father's will be "5x"
  4 years back father's age is 9 means the eq is
  5x-4=9(x-4)
  5x-4=9x-36
  4x=32
  x=8
  hence father's age is 5*8=40
• 8 years agoHelpfull: Yes(3) No(0)
• use elimination process of given choices
  lets take 40 as fathers age then sons age is 8
  4 years back means fathers age is 36 and sons age is 4 which is equal to 9 times of fathers age
• 8 years agoHelpfull: Yes(2) No(1)
• Father's age=f
  son's age=s
  f = 5s
  (f-4) = 9(s-4)
  =>f-4=9s-36
  =>5s-4=9s-36
  =>32=4s
  =>s=8
  =>f=40
• 8 years agoHelpfull: Yes(1) No(0)
• let x=father's age and y= son's age
  x=5y
  now 4 year's back
  x-4=9*(y-4)
  x=9y-36
  substitute the value of x from above equation
  5y=9y-32
  y=8
  and
  x=40
  so 40 is correct answer
• 8 years agoHelpfull: Yes(1) No(0)
• 40. At present x = 5x and 4 years back the age of father was 9y = y and x-4= 5x -4 .we get two eq i.e x-4 = y and 5x-4=9y. Solve it . we get ans is 40
• 8 years agoHelpfull: Yes(1) No(0)
• ans:40 years
  
  son present age=x
  father present age=5x (bcoz father is 5 times his SON'S AGE)
  
  now 4 years back...
  
  SON FATHER
  9(x-4) = (5x-4) //father was 9 times older than son so, 9(sons age)= father age 4 years back..
  9x-36 = 5x-4
  9x-5x = 36-4
  4x = 32
  x = 8
  
  so, father present age=5x i.e., 5*8=40
• 8 years agoHelpfull: Yes(1) No(0)
• Let son present age x
  So father's present age 5x
  4 yr ago father's was 9 times of son's age
  So we may write
  9(x-4)=(5x-4)
  X=8
  So father age will be 5x=5*8=40
• 7 years agoHelpfull: Yes(1) No(0)
• 
  fathers age =x sons age =y
  x=5y;x-4=9(y-4)
  5y-4=9y-36
  y=8 so x=40
  
• 8 years agoHelpfull: Yes(0) No(0)
• option verification
• 8 years agoHelpfull: Yes(0) No(0)
• x = father's age
  y = son's age
  x = 5y
  x-4 = 9(y-4)
  x-4 = 9y-36
  x = 9y-32
  
  5y = x = 9y-32
  5y = 9y-32
  4y = 32
  y = 8
  x = 5y = 40
  
• 8 years agoHelpfull: Yes(0) No(0)
• 40Ans
  F=5s ----(1)
  F-4=9(S-9)
• 8 years agoHelpfull: Yes(0) No(0)
• Present: F = 5 * S;
  Four Years back: F - 4 = 9*(S-4);
  by solving the above two equations we get S =8 and F = 40
• 8 years agoHelpfull: Yes(0) No(0)
• Fathers present age is 40
  
  answer
  Given father = 5* son
  father-4 =9(son-4)
  solving the two equations you will get father age=40
• 8 years agoHelpfull: Yes(0) No(0)
• present age of son and father = x : 5x
  5x-4 = 9(x-4)
  5x-4=9x-36
  4x=32
  x=8
  so present age of father is 40
  
• 8 years agoHelpfull: Yes(0) No(0)
• Father=5*son----------------->1
  Before 4 years
  Father-4=9(son-4)
  5*son)-4=9*son-36
  36-4=9son-5son
  4son=32
  Son=8years
  Father=5*son==>40years
  So answer is 40years
  
  
• 8 years agoHelpfull: Yes(0) No(0)
• Option b is correct 40
• 8 years agoHelpfull: Yes(0) No(1)
• Son's age = x
  Father's age is 5 times son's age = 5x
  4 years back
  F's age = 5x-4
  Where he is 9times older than son
  5x-4 =9 (x-4)
  X=8
  Father present age is 5x
  5*8=40
• 8 years agoHelpfull: Yes(0) No(0)
• ATP
  RaTIOS ARE
  5:1 and 9:1
  SO Balancing the ratios we get
  40:8 and 36:4
  difference is 4 so 4/4=1
  so father present age is 40 yrs and son is 8 yrs
  
• 8 years agoHelpfull: Yes(0) No(1)
• son=x;
  father=5x;
  4 yrs back their ages
  son=x-4;
  father=5x-4;
  A/c-
  9(x-4)=5x-4
  x=8;
  
  father=5x8=40 yrs
• 8 years agoHelpfull: Yes(0) No(0)
• Father's age-f, Son's age-s
  present-f=5s.
  4 yrs back->f-4=(s-4)9.
  =>5s-4=9s-36 (replace with present)
  4s=32, =>s=8
  f=5s, => 40 Ans
  
• 8 years agoHelpfull: Yes(0) No(0)
• f=5s
  f-4=9(s-4)
  by solving above equations we get f=40
• 8 years agoHelpfull: Yes(0) No(0)
• b , (x-4)=9(y-4)
  5y-4=9y-36
  4y=32
  y=8
  x=5y=40
• 7 years agoHelpfull: Yes(0) No(0)
• 40
  y=5x (Age of father:y,age of son:x)
  y-4=9(x-4)
  solving, x=8,
  father's present age=5x=5*8=40
• 7 years agoHelpfull: Yes(0) No(0)
• B) 40
  present ages X,5X
  4 years ago father's age was 9 times older than son 9(x+4)=5x+4
  9x+36=5x+4
  4x=32
  x=8
  5(8)=40
• 7 years agoHelpfull: Yes(0) No(0)
• Let the present age of father be F and son be S
  So from 1St condition
  F= 5 S
  Four year back
  (F-4 )= 9 (S-4)
  S= 8 Year
  Therefore F= 40
• 6 years agoHelpfull: Yes(0) No(0)