• # question_answer A man's age was 5 times his son's age 5 yr ago and he will be three times his son's age after 2 yr. The ratio of their present ages is A)  5 : 2                 B)  5 : 3 C)  10 : 3   D)  11 : 5

Let 5 yr ago, the son's age be xyr and man's age be 5x yr. Their present ages are$\left( x+5 \right)yr$and$\left( 5x+5 \right)\,yr.$ $3\left( x+5+2 \right)=\left( 5x+5+2 \right)$ $\Rightarrow$   $3\left( x+7 \right)=\left( 5x+7 \right)\Rightarrow 2x=14$ $\Rightarrow$               $x=7$ Ratio of present ages of man and son $=(5\times 7+5):(7+5)=40:12=10:3$