SOLUTION: A gallon of paint can cover 30 square feet. If a circular swimming pool had a radius of 10 feet. How many gallons of paint are needed to paint the entire floor of the pool? A)7

Algebra ->  Triangles -> SOLUTION: A gallon of paint can cover 30 square feet. If a circular swimming pool had a radius of 10 feet. How many gallons of paint are needed to paint the entire floor of the pool? A)7       Log On


   



Question 1141750: A gallon of paint can cover 30 square feet. If a circular swimming pool had a radius of 10 feet. How many gallons of paint are needed to paint the entire floor of the pool?
A)7
B)8
C)10
D)11

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Area of the pool is
+A+=+pi%2Ar%5E2+
+A+=+pi%2A10%5E2+
+A+=+314.1593+ ft2
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In words:
[ area to be painted in ft2 ] / [ 30 ft2/gallon ] = [ gallons needed ]
+314.1593+%2F+30+=+10.472+ gallons
D) 11 gallons of paint