Question 893074
h=1.5c
1/c+1/1.5c=1/15

multiply by 15c

15+15/1.5=c
15+10=c
c=25
h=37.5
check
 1/25+1/37.5=1/15
2/50+2/75=2/30
6/150+4/150=10/150
ok

but 
(3/2)r+r=1/15
45/2r+15r=1
3r+2r=2/15
45r+30r=2
75r=2
r=2/75
r=1/37.5