the type of workouts to be followed and the duration.

the best way to lose weight in the gym is to use machines like the running machine or bike machine as they tend to burn fat and calories quicker then most others. the bike is great for legs the running machine is great for legs and the stomach. instead of running try walking fast uphill this tends to burn more calories then running. diet wise fruit and veg all the way. meats good chicken or fish is best (less fat) when not fried that is.also try to eat brown rice, bread and pasta it will fill you up for longer and try to eat it as early as possible then you have longer during the day to burn it off. dont say no to food you love to often either you will just crave it more. if your a chocolate lover try dark chocolate it normally crushs the sugar craving quicker. good luck

well well.... if you wanna lose 20 kilo in 2 weeks, you can follow my formula
1) From your normal 3 meals a day, make it 6 meals a day!(no joke) and reduce the amount you normally eat by 2/3. which means you only eat 1/3 of your normal meal consumption. (this has to be strightly followed!)
2) There are 7 days a week, 6 days are to be used to work out and day for total rest!
-day 1 and day 4 are used to work out your hands like bicepts and tricepts
-day 2 and 5 are used for your shoulder and back
-day 3 and 6 are used for your chest and your leg
3) Everyday before any exercise, you need to run minimum 3 mile on a threadmill and half hour of cycling
4) After each day work out, you must do 150 x sit up
50 each time (do it slowly)
5) Everyday after your exercise go for steambath or sauna
6) Since Sunday will be your off day, eat all you want!
take suppliments like l-carnitine from Wader! Durind day 1-6 always remember no fatty food! expecially pizza or fried food!~
I suggest you to take milk and bread! Just bear for it fot 2 months! and you will see the result!

weight loss is easy
heres the key
eat less...exercise more