The ages of two people differ by 20 years. Five years ago, the elder person was five times as old as the younger person. What are their present ages, respectively?
A
20, 20
B
20, 10
C
25, 15
D
30, 10
Correct Option:
D
Explanation
Let the younger person's present age be x, so the elder person's present age is x + 20. Five years ago, x + 15 = 5(x - 5). Solving gives x = 10, so their present ages are 30 years and 10 years.
