Question

7. What is the surface area of a conical grain storage tank that has a height of 24 meters and a diameter of 16 meters? round the answer to the nearest square meter.
837 square meters
848 square meters
1,991 square meters
1,923 square meters

Answer 1

Formula: http://www.mathwarehouse.com/solid-geometry/cone/images/surface-area-of-cone/total-surface-formula-cone.jpg

Answer 2

Surface area: \(\Large S_a = \pi r h_s + \pi r^2 =\pi r \sqrt{r^2+h^2} + \pi r^2\)
\(\Large S_a=\pi \times \frac{16}{2} \times \sqrt{(\frac{16}{2})^2 + 24^2} + \pi \times (\frac{16}{2})^2\)
\(\Large S_a \approx 837\) \( \large m^2\)

Answer 3

Thank you so much!!!

Answer 4

your welcome :)

Answer 5

@junghyunran is right!