Jack, twenty one years old, is three times as old as his brother. How old will Jack be when he is
twice as old as his brother?

• ans is 28
  present age of jack is 21 his beother is 7
  so after 7 year his brother is 14 and jack is 28
  after 7 years jack age will be double of his brother
• 10 years agoHelpfull: Yes(0) No(0)
• 28 years old
  after 7 yrs his age will b 28 and that of his brother's would b 14
• 9 years agoHelpfull: Yes(0) No(0)