I am 19 year old and had hrct chest(plain and contrast), abdomen and pelvis ct (before and after injecting contrast) in a single day. all these scans were done in single day. reports are normal. will i get cancer in future, how much time will it take?

CT scan of the chest and abdomen are commonly done together in one sitting. There is a small amount of radiation exposure to your body but it is harmless. This is called Medical use of X-rays. It is not associated with development of cancer as long as you do not exceed one such study/ year. Right now you do not need to worry about developing cancer if you eat healthy and avoid tobacco and alcohol

The increase in risk of cancer is not measurable. You can reduce your risk of cancer by adopting healthy habits: Eat a mostly vegetarian diet, avoid alcohol, tobacco and street drugs, avoid excessive exposure to sun, get HPV vaccine, exercise 30 minutes each day, drink enough water so your urine is mostly colorless.