Question 807710
[(1/L1)+(1/L2)+(1/L3)](3)=1

L1=(1/3)L3 ---> L3=3L1

L1=(1/2)L2 ---> L2=2L1

(1/L1)+(1/2L1)+(1/3L1)(3)=1

11/2L1 = 1 so L1 = 11/2

L1=5.5 hrs (smallest)
L2=11 hrs (medium)
L3=16.5 (largest)