The ratio of the age of a man and his women is 4:3. At the time of first meet theratio was 5:3 and After 4 years this ratio will become 9:7. How many yrs ago were they met?	Choose the correct choice from the following choices.
A) 10  B) 12  C) 15  D) 16  E) 20
Let the present age of the man and his wife be 4x and 3x respectively.   After 4 years this ratio will become 9:7   ⇒(4x+4):(3x+4)=9:7⇒7(4x+4)=9(3x+4)⇒28x+28=27x+36⇒x=8   Present age of the man =4x=4×8=32   Present age of his wife =3x=3×8=24   Assume that they got married before t years. Then,   (32−t):(24−t)=5:3⇒3(32−t)=5(24−t)⇒96−3t=120−5t⇒2t=24⇒t=242=12   12
<result>B</result>
The ratio of the age of a man and his women is 4:3. At the time of first meet theratio was 5:3 and After 4 years this ratio will become 9:7. How many yrs ago were they met?