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saul85 [17]
2 years ago
8

The surface area of a cylinder?

Mathematics
2 answers:
goldfiish [28.3K]2 years ago
8 0

Answer:

18.85 ft^2\\

*You should run the numbers yourself as well. Sometimes different calculators will get marginally different numbers or use a different rounding for \pi that gives a slightly different answer*

Step-by-step explanation:

Surface area of a cylinder: 2\pi rh+2\pi r^2

Where h is the height and r is the radius. Remember that the radius is half the diameter, and the diameter is a straight line that passes through a circle.

I could be wrong, but I think you had the correct equation but used the diameter in stead of the radius to get 50.36.

Radius: 1   Height: 2

Plug numbers into equation:

A=2\pi (1)(2)+2\pi (1)^2= 18.8495. . .

I hope that helps!

ioda2 years ago
7 0

Answer:

18. 84 ft² or 18.85 ft² when rounded to the nearest tenth

Step-by-step explanation:

2πrh+2πr²

2× 3.14 × 1 × 2= 12.56

2 × 3.14 × 1² = 6.28

12.56 + 6.28 = 18.84

Have a great day :)

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