A is 4 yrs old and B is thrice A>when A is 12 years, how old will B be?
16 20 24 28

• 20
  
  A is 4 yrs old and B is thrice A i.e 12 years.
  
  Age diff = 8 yrs.
  when A is 12 years , B will be 12+8=20 years.
• 12 years agoHelpfull: Yes(70) No(7)
• When a is at 4 years b is 3 times that is his age is 12 so
  given problem is that a is 12 years old then the diff might be 8 years
  
  so by adding to the bs present age
  12+8 =20 , then we will get 20 so answer is 20.
• 11 years agoHelpfull: Yes(6) No(3)
• given that A=4 B=12 so add 8 for both then we get A's age is 12
  nd B's age is 20
• 11 years agoHelpfull: Yes(4) No(2)
• ans is 28
  becoz b is thrice wn a is 12 years not in 4 yrs old
  so b is 36
  so 12-4=8
  so 36-8=28
  
  
• 9 years agoHelpfull: Yes(2) No(2)
• IT WILL BE 20
• 9 years agoHelpfull: Yes(1) No(1)
• A=4, so B=4*3=12. now A=12 so B=12+8=20
• 7 years agoHelpfull: Yes(1) No(0)
• A=12;
  B=3A;
  B=3*12;
  B=36
  When A=4 then B will
  B=36-8;
  B=28
• 7 years agoHelpfull: Yes(1) No(0)
• ans will be 20.
  when A is 4yrs old, B was (4*3)=12 yrs old.
  so the diff of their age is (12-4)=8yrs
  then when A is 12 yrs old, B will be (12+8)=20 yrs old...
• 7 years agoHelpfull: Yes(0) No(0)
• Correct answer
  is 20
  
• 7 years agoHelpfull: Yes(0) No(0)
• 20
  as A is 4 ,B is 12
  so 12-4=8
  then 12+8=20
• 7 years agoHelpfull: Yes(0) No(0)
• A=4
  b=a*3=4*3=12
  When a=12
  12-4=8
  b=12+8=20years
• 7 years agoHelpfull: Yes(0) No(0)
• a = 4 yrs
  b= 12 yrs
  a=12 yrs( 12-4=8)
  b=12+8= 20yrs ans b
• 7 years agoHelpfull: Yes(0) No(0)
• present age A=4
  B=3A therefore B's present age =3*4=12
  After 8 years A will be of 12 years
  after 8years B is 12+8=20 Years old
• 6 years agoHelpfull: Yes(0) No(0)
• Answer =20
• 4 years agoHelpfull: Yes(0) No(0)