A father is Quadrice as old as his daughter today. After 20 years, he would be only two times as old. At the time of daughter’s birth, how much old the father be? Choose the most appropriate option
A) 30
B) 10
C) 40
D) 20
E) 60
A   30   If the ages of daughter and father today by ‘A’ and ‘4A’ years correspondingly.   4A + 20 = 2 (A+20)   A = 10 years =&gt; 4A = 40 years.   30t the time of daughter’s birth, father’s 30ge   40 – 10 = 30 years old
<result>A</result>
A father is Quadrice as old as his daughter today. After 20 years, he would be only two times as old. At the time of daughter’s birth, how much old the father be?