Q:

The ratio of present ages of Suresh and Manish are 5 : 1 respectively. After how many years the ratio of the ages of Suresh and Manish will become 3 : 1 if the present age of Manish is 7 years -

• 1
  21 years
• 2
  10 years
• 3
  7 years
• 4
  14 years