The age of Ram and Suba are in the ratio 5:6 and after 4 years their ratios are 7:8 then what is the present age of Suba?

• Let ages of Ram and Suba are R & S respectively, then
  
  R/S = 5/6 => R = (5/6)*S -------(1)
  
  after 4 years,
  
  (R+4)/(S+4) = 7/8
  => 8R+32 = 7S+28
  => 8*5S/6 = 7S - 4 [from (1)]
  => 20S = 21S - 12
  => S = 12
  
  present age of Suba = S = 12 Years
• 10 years agoHelpfull: Yes(15) No(1)
• 5:6
  after 4 years 5x+4/6x+4=7/8
  so x=2 suba age 12
• 10 years agoHelpfull: Yes(4) No(0)