A cylindrical storage tank has a depth of 9 ft and a radius measuring 2 ft. The tank needs to be painted. If 1 pint of paint covers 50 ft2 and you can only purchase full pints of paint, how many pints must be purchased to paint the exterior of the storage tank?

3 pints of paint

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Surface area of a cylinder: 2 π r2 + 2 π r h

Where r is the radius and h is the height of the storage.

Replacing with the values given:

SA = 2 π (2)^2 + 2 π (2) 9

SA= 2 π (4)+ 2 π 18

SA= 138.23 ft2

Since 1 pint of paint covers 50 ft2 , we have to divide the surface area by the area that each pint of paint covers:

138.23 / 50 = 2.76 = 3 pints of paint

Feel free to ask for more if needed or if you did not understand something.