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geniusboy [140]
2 years ago
12

30. Find the volume of the figure below. 21 km 15 km 19 km 9 km

Mathematics
1 answer:
Kazeer [188]2 years ago
8 0

Answer:

See below ....none of your answer choices  'fit'

Step-by-step explanation:

Break it into two pieces....a triangular prism and a square pyramid

prism volume = (area) * length

                      ( 1/2 base * height)     *  length  

     Use pythagorean theorem to find height of triangular prism = 12

                            1/2 * 12 * 9   * 21 = 1134 km^3

Pyramid volume = 1/3 base * height =

               =   1/3  *   (9*21)    *    7 = 441 km^3

Summed = <u>1575 km ^3  </u>        

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