The ages of Gaurav and Goutham will be in the ratio 5 : 7 after ten years from now and will be in the ratio 13 : 18 after twelve years from now. Find the ratio of the sum of their ages 10 years hence to the sum of their ages 12 years hence.
1 : 25 : 27
2 : 13 : 15
3 : 14 : 17
4 : 18 : 23
5 : 30 : 31
1 : 25 : 27
2 : 13 : 15
3 : 14 : 17
4 : 18 : 23
5 : 30 : 31