Question

why humayun ruled till 1555 to 1556​

Answer 1

He confronted and defeated Lodhi in 1526 at the first battle of Panipat, and so came to establish the Mughal Empire in India. Babar ruled until 1530, and was succeeded by his son Humayun. Humayun (1530-1540 and 1555-1556): ... He ruled India for nearly a decade but was ousted by Sher Shah Suri, the Afghan ruler.

Answer 2

he was a weak ruler........