3:5:7
3+5+7=15
15 units
33ft 9in =15 units
convert to feet
33ft=12in times 33=396in
396+9=405
405in=15units
divide both sides by 15
27=1unit
p=3units
p=327
p=81 inches=6ft 9in
q=5 units
q=527
q=135 inches=11ft 3in
r=7units
r=7*27
r=189 inches=15ft 9in
p=6ft 9in
q=11ft 3in
r=15ft 9in