Before mt. Everest was discovered what was the highest mountain on earth.

Verified Answer :

. Kangchenjunga ( 8,586 metres (28,169 ft)) was considered to be the highest mountain from 1838 until 1852. 

Kangchenjunga  ( 8,586 metres
(28,169 ft)) was considered to be the highest mountain from 1838 until

  1. Mount Everest, 8,848 metres (29,029 ft). Established as highest in

1852 and officially confirmed in 1856.

Kangchenjunga Main is the
highest mountain in India, and the easternmost  of the mountains higher
than 8,000 m (26,000 ft). It is called Five Treasures of Snow after its five high peaks.