How many years older will you be 1.20 billion seconds from now? assume you are 20 yrs old

One (Non-Leap) Year in seconds would be Secs per min X Mins per hour X Hours per day X Days per year ie (60 x 60 X 24) X 365 equals 31536000 So 1.2 billion seconds divided by seconds per year gives us 1200000000 31536000 which is 38.05 or rounding down 38 years Note your starting age is not relevant