The average age of 3 sisters is 15. If the ages of 2 sisters are 12 years and 15 years, the age of the third sister is-
The difference between the ages of two sisters is 10 years. 15 years ago their ages were in the ratio 2 :1. Find the ratio of their ages 15 years hence.
The ages of the two sisters are 11 years and 14 years. In how many years time will the product of their ages be 304?