How did rome finally destroy carthage once it penetrated the walls of carthage

The Romans burnt the city to the ground after penetrating the walls.

Explanation:

The Roman general was adamant to penetrate the walls. Romans were able to penetrate the wall after three years.

Once they were inside the city, they left no leaf unturned. The pent up aggression which was lingering for three years was seen. They burnt the city to the ground. Everything was destroyed.

The ruins of Carthage still lie under the city of Tunisia.