The difference between the ages of A and B is 10 years. Ten years ago, A was twice as old as B. Find the age of A, 10 years hence.
a.20 years
b.30 years
c.40 years
d.50 years

• ANS:-c
  given that A-B=10 ->(1)
  A-10=2(B-10)
  A=2B-10 ->(2)
  by solving 1&2
  we get A=30,B=20
  After 10 years age of A is 40 years
• 12 years agoHelpfull: Yes(5) No(0)
• given
  A-B=10 ------- 1
  10 yrs ago
  A-10=2(B-10)
  A-2B=-10----- 2
  from eq 1 and eq 2
  B=20 A=30
  age of A 10 yrs hence = 40
  
  
  
• 11 years agoHelpfull: Yes(1) No(0)
• ans:b
  A-B=10(given)
  also given
  A-10=2(B-10)........(a)
  A+10=?
  Then A=B+10........(1)
  put 1 in a
  ==>B=10
  and A=20
  Then A+10=30
  
• 11 years agoHelpfull: Yes(1) No(3)