The ages of 2 boys differ by 16 yrs. 6 yrs ago, the elder one was 3 times as old as the younger one. What are their present ages of the elder boy? Options.
A) 10 B) 20 C) 30 D) 40 E) 50
Let present age of the elder person =x and   present age of the younger person =x−16   (x−6)=3(x−16−6)⇒x−6=3x−66⇒2x=60⇒x=602=30   30
<result>C</result>
The ages of 2 boys differ by 16 yrs. 6 yrs ago, the elder one was 3 times as old as the younger one. What are their present ages of the elder boy?