Total no. of rings & chain manufactured per day = 24.
Timetaken in manufacturing ring = 1 hour
Time taken in manufacturing chain = 30 minutes
One time available per day = 16
Maximum profit on ring = Rs 300
Maximum profit on chain = Rs 190
Let gold rings manufactured per day = x
Chains manufactured per day = y
L.P.P. is
Z is maximum at (8, 16).
8 gold rings & 16 chains must be manufactured per day.