Good balance of both works for me...cardio to get the blood pumping then weights. As your body rebuilds after the weights, you keep burning cals and keep your metabolism up longer after the workout.

Split it. That's good for cardiovascular health, endorphins, and building muscle mass. I wouldn't do more than 30 minutes of cardio

Depends on your fitness level. BUT DO NOT WORKOUT THE SAME MUSCLE OVER AN HOUR! You risk injury.

But, honestly, it doesn't matter how long you work out. It starts with what you put in your body.

That is the major bulk of this war!

Don't get me wrong, do workout because it speeds up your metabolism and helps you increase endurance, or tone up (depending what you're doing). Plus, a bunch of other benefits, but to lose weight? Not necessarily in the way you're thinking.

It's not about the time as much as how you maximize the time. Cardio in the form of a bike or elliptical is good but you'll burn more calories doing full body workouts. Most gyms have those types of classes. But making sure to work weight training in is super important. The trick there, if you're trying to shed some weight, is making sure you keep your heart rate up. So you want to try to keep the 'rest' periods short between sets and exercises.

You definitely need some weight training in the program, for reasons already suggested (muscle burns more calories, metabolism increases, etc.); also for bone strength, balance, etc. especially in middle age.
But exercise alone will not lead to weight loss. A healthier and more calorie-conscious diet is also required.

To shed pounds, just cardio would be most beneficial.

I try and fit 3 days of cardio and 3 days of weight lifting in a week. Alternating weights and cardio every other day . I think they’re both equally important.

If you want to shed pounds then you should do more cardio and watch what you eat.