Please Give Me the Solution and The Figure of the problem(its very impt. for me to understand)

Problem

1.The diameter of a well is 6 feetand the water is 7 feet deep.How many gallons of water are there in the well,reckoning 7.48 gallons to a cubic foot?

2.A paint manufacturer desires a cylindrical steel drum to hold 50 gal. of roof paint. For convenience in handling, it is found necessary to limit the inside diameter to 2 1/2ft. find the height of the drum desired. (one gal. =231 cu. in.)

3..Find the waste in making the largest possible cylindrical rod from a bar of iron 3 feet long which has a square cross section whose diagonal is 6 inches

4.A cubic foot of water weights about 62.4. What must be the diameter of a cylindrical pail 1 ft.high in order for it to hold the water from 25 lb. of ice? how many square inches of sheet tin are required to make the pan (neglect waste in cutting and lapping )