add 5 feet 9 inches and 10 feet 11 inches
We get 15 feet and 20 inches and since 12 inches = 1 foot16 feet 8 inches
Firstly convert inches to feet12inches=1foot9inches=X1×9=12×X9=12XX=9/12=0.75 foot
12i=1f11i=x11=12xX=11/12=0.916666666667
5+0.75=5.75
10+0.916666666667=10.9166666667
5.75+10.91666666667=16.6recurring