Answer ! ollie's oil company wants to repaint the barrels in which the oil is stored. the workers need to know how much area they will be painting so that they can order the correct amount of paint. if an oil barrel is 5 feet tall with a radius of 3 feet, what is the surface area of one barrel? 43.61 square feet 85.7 square feet 150.72 square feet 180.34 square feet plz explain why, i wanna know how to do it myself

One barrel is equal to one cylinder. A cylinder consists of two faces which are circles and everything in between. The area of a circle is pi times radius squared. Using 3.14 as pi, multiply the square of the radius (9) by 3.14. You should get 28.26 . Multiply that because a cylinder consists of TWO circles as faces. That should be 56.52. To find the "wrap" or surface area of the space in between the circle, you need to find the circumference of the circle and multiply it by the height of the barrel (5ft). The circumference of a circle is pi (3.14) times diameter (6). The circumference of the barrel should be 18.84. Multiply that by the height and you should get 94.2. Now, take that number and add it to 56.52. The final answer would be 150.72