"In order to grow fully matured clones in half of the time it takes ordinary Humans, the Kaminoans modified the clones by implementing "age acceleration" into their development, thus allowing the clones to reach adulthood in ten years instead of two decades. Although the exact rate at which clones aged is unknown, it appears to be nearly twice as fast a natural-born Human and it is theorized that this rate increased as clones grew older—especially under stress, thus leading to a dramatic shortening of the clones' life expectancy. Despite these modifications, the clone troopers could still think and act creatively and possessed a level of individuality that their Kaminoan creators did not anticipate."
He'd be far older due to the age acceleration.
