How long will it take me realistically to get from 89kilos to 65kilos what should i eat how much should i exercise?

Very difficult: To answer in this 400 character or less format. A realistic weight loss plan would be to aim to lose 1-2 lbs per week. Otherwise, remember - while it's important to eat healthy - it's also important to focus on caloric restriction for weight loss purposes. Also, while exercise provides some many benefits and can help with weight loss, data suggests caloric restriction is key with weight loss.