The ratio of Adam's age to her mother's age is 3:8.The difference of their ages is 35 years.The ratio of their ages after 4 years will be
a. 7:12
b. 5:12
c 38:43
d 42:47

• adam's age:mother=3:8
  8x-3x=35
  5x=35
  x=7
  present ages adam:mother=3*7:8*7
  =21:56
  after 4 years=25:60=5:12
• 9 years agoHelpfull: Yes(0) No(2)
• A/M=3/8
  Also M-A=35
  From ratio, A=3/8M
  On substituting and solving, we get M=56 and A=21
  
  So, after 4 years, A/M=25/60=5/12
• 9 years agoHelpfull: Yes(0) No(0)
• (b)5:12
  a:m=3:8
  m-a=35
  =>a=m-35
  =>(m-35)/m=3/8
  By C&D,
  (m-35+m)/(m-35-m)=(3+8)/(3-8)
  (2m-35)/(-35)=11/(-5)
  (2m-35)/7=11/1
  2m-35=77
  2m=77+35=112
  m=112/2
  m=56
  =>a=56-35=21
  (a+4)/(m+4)
  =25/60
  =5/12
• 8 years agoHelpfull: Yes(0) No(0)