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

Question 206148: If 1 gallon of paint covers 400 square feet, about howmany gallons of paint are needed to paint the outside of a sperical tank of diameter 20 feet?
Answer by Marth(57) (Show Source): You can put this solution on YOUR website!
The surface area of a sphere is found by
Given that the diameter is 20ft, the radius is =10ft

The surface area is therefore = square feet.
Divide that by 400ft per gallon of paint, and you need gallons of paint, which is around 3.14.
RELATED QUESTIONS
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 1 gallon of paint covers 400 square feet, about how many gallons of paint are needed... (answered by Targetweek)

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)

A contractor is going to paint the room shown above. The paint costs $28.03 a gallon. One (answered by Theo)

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