Octagonal tank

The tank has the shape of a regular octagonal prism without an upper base. The base edge has a = 3m, the side edge b = 6m. How much metal sheet is needed to build the tank? Do not think about losses or sheet thickness.

Correct answer:

S =  187.4558 m2

Step-by-step explanation:

a=3 m b=6 m  S1=8 a b=8 3 6=144 m2 S2=2 (1+2) a2=2 (1+2) 3243.4558 m2  S=S1+S2=144+43.4558=187.4558 m2

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips to related online calculators
Pythagorean theorem is the base for the right triangle calculator.
See also our trigonometric triangle calculator.

We encourage you to watch this tutorial video on this math problem: video1   video2   video3

Related math problems and questions: