10. H 30, K 50 and L 80.

11. 20 and 50.

12. 36.

13. 62.

14. 114.

15. 73 1/2 years.

16. [107].

17. 96.

18. 216 miles.

19. 10 1/2 years the man, 31 1/2 years the woman.