Rajesh is 20 years old and Mary is 30years old. How many years ago was the ratio of their ages 2:5? Select.
A) 10
B) 15
C) 20
D) 25
E) 30
Suppose the ratio was 2:5, x years ago   20-x / 30-x = 2/5   2x = 40   x = 20   Answer is 20
<result>C</result>
Rajesh is 20 years old and Mary is 30years old. How many years ago was the ratio of their ages 2:5?