1.) how many square meters of tin are required to make a cylindrical bucket that has a radius of 15 cm and an altitude of 40 cm, allowing 10% for the waste?

2.) when an object is immersed in water in a right circular cylinder 20 cm in radius, the level of water increases by 20 cm. find the volume of the object?

3.) how many liters of water are required to fill a swimming pool which is 20 meters wide and 40 meters long, if when the pool is filled w/ water, the depth of the water increases uniformly along the length from 1 meter to 3 meters?

tnx tnx tnx!!!