Final answer:
The specific age of Gobind Rai (Guru Gobind Singh) depends on the historical context or event. Born on December 22, 1666, he became the tenth Sikh Guru at age nine after his father's execution in 1675.
Step-by-step explanation:
The age of Gobind Rai, who later became known as Guru Gobind Singh, depends on the specific event or time being referred to. Guru Gobind Singh was a significant figure in Sikh history, who became the tenth Sikh Guru at the young age of nine after his father, Guru Tegh Bahadur, was executed by Mughal Emperor Aurangzeb in 1675. Without a specific context or event mentioned in the question, it is not possible to provide an exact age. However, Guru Gobind Singh was born on December 22, 1666, so you can calculate his age as of any given date by comparing the date in question to his birth date.