9514 1404 393
Answer:
C) 3 5-gallon cans and 2 1-gallon cans
Step-by-step explanation:
The surface area of one tank is given by the formula ...
SA = 2πr(r +h) . . . . . where r is the radius and h is the height
The given tanks have a diameter of 6 ft, so a radius of 3 ft. The surface area of each one is ...
SA = 2(3.14)(3 ft)(3 ft +6 ft) = 169.56 ft²
Then the area of 35 tanks is ...
35 × 169.56 ft² = 5934.6 ft²
If each gallon of paint covers 350 ft², then the number of gallons required is ...
(5934.6 ft²)/(350 ft²/gal) = 16.956 gal
To minimize cost, the largest possible number of larger cans should be purchased. The 17 gallons of paint required can be purchased at least cost by buying ...
- 3 5-gallon cans
- 2 1-gallon cans
