A) 5 : 3
B) 4 : 3
C) 10 : 7
D) 3 : 5
Correct Answer: A
Solution :
5 yr ago, the age of father = 2x years (let) |
Age of son = x years |
\[\therefore \] \[2x+5+x+5=100\] |
\[\Rightarrow \] \[3x=100-10=90\] |
\[\Rightarrow \] \[x=\frac{90}{3}=30\] |
\[\therefore \]Father's present age \[=2x+5=60+5=65\,\,\text{yr}\] |
Son's present age \[=x+5=30+5=35\,\,\text{yr}\] |
After 10 yr, |
Ratio \[=\frac{65+10}{35+10}=\frac{75}{45}=\frac{5}{3}=5:3\] |
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