10 years ago, Chandravati's mother was 4 times as old as her daughter. After 10 years, the mother will be twice as old as the daughter. The present age of Chandravati is:
A
5 years
B
10 years
C
20 years
D
30 years
Correct Option:
C
Explanation
Let Chandravati's present age be x. The age conditions give M−10 = 4(x−10) and M+10 = 2(x+10). Solving gives x = 20 years.
