Read the following excerpt carefully and answer the questions that follow.
How tanks were built
About a tank constructed by Krishnadeva Raya, Paes wrote: The king made a tank … at the mouth of two hills so that all the water which comes from either one side or the other collects there; and, besides this, water comes to it from more than three leagues (approximately 15 kilometres) by pipes which run along the lower parts of the range outside. This water is brought from a lake which itself overflows into a little river. The tank has three large pillars handsomely carved with figures; these connect above with certain pipes by which they get water when they have to irrigate their gardens and rice-fields. In order to make this tank the said king broke down a hill In the tank I saw so many people at work that there must have been fifteen or twenty thousand men, looking like ants.
1. How did the water get collected in the tank? 2
2. What were the other sources of water for Vijayanagara?
3. How many people were engaged in the construction of the tank?