Hi people. I'm a working adult at around the age of 25. Due to
my working hours, I can only work out in the gym for at most 1hr -
1.5hrs. I end work at 8pm. The earliest I can reach the nearest gym
is around 30-45mins. Most of the time I would work out until the
gym instructor tells me that the gym is closing, which is around
10pm. Hence my work out schedule is tight and I hope you guys can
advise me on whether this work out regime of mine is good 
Monday and Wednesday (arms day):
Barbell Bicep Curl : 6 sets X 10 reps at 20kg (no including weight
of bar)
Dumbbell Bicep Curl : 4 x 10 at 12kg each
Cable Tricep Extension : 6 x 10 at 45kg
Cable Overhead Tricep Extension : 6 x 10 at 45kg
Two Arm Standing Dumbbell Extension : 6 x 10 at 17.5kg
Lying Dumbbell Extension : 6 x 10 at 10kg
Dumbbell Reverse Fly : 4 x 10 at 10kg
One Arm Cable Lateral Raise : 4 x 10 at 15kg
Bent Over Dumbbell Row : 4 x 15 at 17.5kg
Leg Extension : 6 x 10 at 45kg (I've injured my knee ligament so
I'm only doing this as it doesn't hurt my knee and to maintain my
quads)
(Usually might not have enough time to complete everything
depending on time)
Tuesday and Thursday (chest and shoulder day)
Barbell Chest Press : 4 sets x 10 at 40kg
Dumbbell Chest Press : 4 sets x 10 at 17.5kg each side
Dumbbell Inclined Chest Press : 4 sets x 6 at 17.5kg each
side
Cable Crossovers (bent over) : 6 sets x 10 at 20kg
Cable Crossovers (mid chest) : 6 sets x 10 at 20kg
Military Press : 6 sets x 10 at 20kg (excluding bar)
Hanging Knee Raise: 4 sets x 15 with 10kg weight between my
legs
Declined Sit Up : 3 sets x 50
(Can complete most of the time)
Any inputs?