Four years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages?
Pick:  A) 14  B) 17  C) 29  D) 31  E) 35
Let present age of P and Q be 3x3x and 4x4x respectively.   Ten years ago, P was half of Q's age   â‡’(3xâˆ’4)=1/2(4xâˆ’4)   â‡’6xâˆ’8=4xâˆ’4   â‡’2x=4   â‡’x=2   Total of their present ages   =3x+4x=7x3 +4= 
<gadget id="calculator">3 +4</gadget>
<output>7</output>
7x=7Ã—2=14   14
<result>A</result>
Four years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages?