Question

Unsaved Find the surface area of a conical grain storage tank that has a height of 46 meters and a diameter of 16 meters. Round the answer to the nearest square meter.

Answer 1

The formula for the surface area of a cone is
`SA= \pi r(r+ √(h^2+r^2) )`. Filling in accordingly, we have
`SA= \pi (8)(8+ √(46^2+8^2) )` and
`SA=8 \pi (8+ √(2116+64))`. That will simplify to
`SA=8 \pi (8+ √(2180) )` and
`SA=8 \pi (8+46.69047)`. If we LEAVE pi in the answer you would have
`437.5 \pi` which rounds to
`438 \pi`. If you multiply pi in, you would have 1375.5 or, rounded, 1376. Of course those labels are all meters squared.