Conversation so far:
when did Ruhollah Khomeini die?
3 June 1989
how did Ruhollah Khomeini die?
Khomeini's health declined several years prior to his death. After eleven days in Jamaran hospital, Khomeini died on 3 June 1989 after suffering five heart attacks in just ten days.
what happened in 10 days for Ruhollah Khomeini in Jamaran hospital?
Ruhollah Khomeini died on 3 June 1989 after suffering five heart attacks in just ten days

Question: how old was he when he died?
Self-contained rewrite: how old was Ruhollah Khomeini when he died?