The top of a grain silo is half of a sphere. If you wanted to paint the sides and the roof, how much surface would you have to cover? Radius=15ft, Height=42ft. (Round your answer to the nearest 1ft squared.)
Assuming the height given is to the top of the dome, the silo consists of a 15 ft radius hemisphere and a 30 ft diameter cylinder that's (42-15) = 27 ft tall. The surface area of the silo: A = πDh + 2πR? A = 2πR(h+R) A = 2π(15)(27+15) A = 30*42π A = 1260π = 3958 sq.ft. ...
