Answer :
5 1/2 = 5.5, 60 3/8 = 60.375
6a+5.5a=60.375
11.5a=60.375
a= 60.375/11.5 = 5.25 or 5 1/4 feet
6a+5.5a=60.375
11.5a=60.375
a= 60.375/11.5 = 5.25 or 5 1/4 feet