In 1950, John was 4 times as old as Tom. In 1955, Richard was 3 times as old as Tom. In which year was John twice as old as Tom? Answers
A) 1960  B) 1970  C) 1972  D) 1975  E) 1980
In 1950: Jo = 4 To-------------- eq1   In 1955: Jo +5 = 3(To+5)---------eq2   Thus in 1950, solving eq1 and eq2   Jo = 10 , Jo =40   Now for each year we can calculate:   1960: Jo = 50 , To=20   1965: Jo = 55, To=25   1970: Ri= 60, Ro = 30   Thus Ans:1970
<result>B</result>
In 1950, John was 4 times as old as Tom. In 1955, Richard was 3 times as old as Tom. In which year was John twice as old as Tom?