Present ages of Karan and Arjun are in the ratio 4 : 5 respectively. Six years hence the ratio becomes 7 : 8. What is the sum of the present ages of Karan and Arjun?
1) 18 years
2) 30 years
3) 36 years
4) Can't be determined

• Let the present ages be 4x,5x. According to question,(4x+6)/(5x+6)=7/8. Therefore x=2
  4x=8,5x=10.
  Sum=18
  Option1
• 7 years agoHelpfull: Yes(11) No(0)
• 1) 18 years
  
  Let the present age of Karan=K and Arjun=A, then
  K/A= 4/5 or 5K =4A ----(i) and
  (K+6)/(A+6)=7/8 or 8K -7A = -6 ----(ii)
  On solving (i) & (ii), K=8, A=10
  So sum of the present ages=K+A=8+10= 18
• 8 years agoHelpfull: Yes(4) No(4)
• 4x-6/5x-6=7/8
  6=3x
  ---->x=2;
  8+10=18
• 7 years agoHelpfull: Yes(1) No(1)
• given:
  K A
  present ages 4 5
  6 yrs hence 7 8
  ratio difference 3 3 i.e. equal
  k age =6/3*4=8
  A age=6/3*5=10
  sum=8+10=18.
  correct option is 1
• 7 years agoHelpfull: Yes(1) No(0)
• K:A=4:5
  (4x+6)/(5x+6)=7/8
  x=2
  so,
  K+A=18
• 7 years agoHelpfull: Yes(0) No(1)
• Let the Ratio factor be , ages become 4x and 5x.. after 6 years.. ages become... 4x+6 and 5x+6...
  Current Ratio is 7:8... so 4x+6/5c+6 = 7/8
  x=2 after solving..
  Place it in 4x+6+5x+6 as current sum of ages is asked for.. it comes 30...!!!
• 7 years agoHelpfull: Yes(0) No(3)
• Let present age of karan=4x & arjun=5x.
  
  6 years hence,therefore karan=4x+6 & arjun=5x+6
  
  (4x+6) / (5x+6) = 7/8
  
  x=2
  
  by substituting x=2 in their present ages,sum of their ages will be 18 years
• 7 years agoHelpfull: Yes(0) No(0)
• 18
  4x+6/5x+6 =7/8
  On solving we get x as 2
  Substitute x and on adding up we get 18
• 7 years agoHelpfull: Yes(0) No(0)
• let the present ages be 4x and 5x
  given 7x+6/8x+6=4/5
  35x+30=30x+24
  3x=6
  x=2
  sum of present ages = 4x+5x
  =4*2+5*2
  =18 years
• 7 years agoHelpfull: Yes(0) No(0)
• 18 years is ans
• 5 years agoHelpfull: Yes(0) No(0)
• Present ages are 4x,5x
  6 year after the ratios are 7:8
  4x+6:5x+6=7:8
  X=2
  4x+5x=18
• 5 years agoHelpfull: Yes(0) No(0)
• 4*2:5*2=8:10
  8+6=14
  10+6=16
  14/2:16/2=7:8
• 4 years agoHelpfull: Yes(0) No(0)
• Ratio is 4x/5x
  After 6 year ratio is 4x+6/5x+6=7/8
  3x=6
  Therefore x=2
  Present age is 14 and 16
  Summ of their age is 14+16=30
• 4 years agoHelpfull: Yes(0) No(0)