SOLUTION: If 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed to paint the outside of a spherical tank of diameter 20 feet?

Question 206149: If 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed to paint the outside of a spherical tank of diameter 20 feet?
Answer by Targetweek(62) (Show Source): You can put this solution on YOUR website!
SA of a sphere is given by...
-
Since the radius is half of the diameter (20), r = 10
Next plug the value in
-
-
-
-
=
Then divide SA by 400
and you get 3.14
Assuming that you buy 1 gallon cans of paint it would take 4 cans but it you want the exact number then it would be 3.14 gallons
RELATED QUESTIONS
If 1 gallon of paint covers 400 square feet, about howmany gallons of paint are needed to (answered by Marth)

if 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed... (answered by richwmiller)

if 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed... (answered by solver91311)

If 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed... (answered by stanbon)

If a gallon of paint covers 450 square feet, how many gallons of paint are needed to... (answered by rfer)

If 1 gallon of paint covers 450 sq. feet, how many gallons are needed to paint a room... (answered by MathLover1,math_tutor2020)

PROBLEM 1. If the area of an equilateral triangle is 36 suare centimeter, find its side... (answered by mananth)

I have a square wall with sides of 18ft. If a gallon of paint covers 100 sq ft, how many... (answered by wilft1)

If the maintenance men are going to paint a spherical water tower whose radius is 30 feet (answered by Alan3354)