Answer:
64 seconds.
Explanation:
If it takes you 32 seconds to walk from the first (ground) floor of a building to the third floor, then every 3 floors takes you 32 seconds.
So, since 6 is twice as big as 3, it would take you twice as long to walk 6 floors. Therefore, it will take you 64 seconds, or 1 minute and 4 seconds.