Answers

2016-03-10T22:30:38+05:30
Since A+B=110
before 20 years the age of both will be less 20 years than now.
so,before 20 years=110-40=70
now,4x+3x=70
7x=70
x=70/7=10
so age of A before 20 years=4x=4×10=40
so,current age of A=40+20=60years
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