A cylindrical reservoir, from 5 meters, high is 6 meters, to be coated on the surface, the average thickness is 10cm, then the cement surface brushs silver powder, how many square meters is the area of the silver powder? (Results Retaining a decimal) PS: 2020 high quality final mathematics test volume! Want to verify your answer!

addition: ah! Not, the radius is 6 meters, high is 4 meters. Trouble, thank you!

Additional: He said that it was on the surface of the cement brush silver powder, he should have a ring, above .....

+3

VotesSilver powder area = bottom area + side area

π * R2 + π * D * h = 3.14 * (5-0.1) 2 + 3.14 * (5-0.1) * 2 * 6 =260.0

Larry Green- May 19, 2021 |

+2

Votes有什么问题吗

亲

George- May 19, 2021 |