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o-na [289]
3 years ago
10

Can someone help me with this 1 math problem. I posted a picture of the question. ​

Mathematics
1 answer:
NeX [460]3 years ago
4 0

Step-by-step explanation:

For conical part: h = 14 in & r = 9 in

For hemispherical part: r = 9 in

V_{prop} = V_{cone} +V_{hemisphere} \\   = \frac{1}{3} \pi {r}^{2} h +  \frac{2}{3} \pi {r}^{3}  \\ =\frac{1}{3} \times 3.14 \times  {9}^{2}  \times 14 +  \frac{2}{3}  \times 3.14 \times  {9}^{3}  \  \\  = 1,186.92 +  2 \times 3.14 \times 243 \\  = 1,186.92 + 1,526.04 \\  = 2,712.96 \:  {inch}^{3}  \\

Another way:

V_{prop} = V_{cone} +V_{hemisphere} \\   = \frac{1}{3} \pi {r}^{2} h +  \frac{2}{3} \pi {r}^{3} \\\\=\frac{1}{3} \pi {r}^{2}(h+2r)\\\\= \frac{1}{3}\times 3.14\times {9}^{2}(14+2\times 9)\\\\= \frac{1}{3}\times 3.14\times 81(14+18)\\\\=  3.14\times 27\times 32\\\\= 2,712.96\: {inch} ^3

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