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briana.img

  • one year ago

Find the height of the cylinder?

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  1. briana.img
    • one year ago
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  2. briana.img
    • one year ago
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    need help :( steps?

  3. campbell_st
    • one year ago
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    what is the radius of the cylinder..?

  4. campbell_st
    • one year ago
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    find the radius of the cylinder is the 1st step to finding the height of the cylinder

  5. briana.img
    • one year ago
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    @campbell_st yeah it's 7 soo 461.8= 2(49pi) + hpi ???

  6. campbell_st
    • one year ago
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    well the surface area formula is \[SA = 2\pi r^2 + 2 \pi r h\] with r = 7 \[461.8 = 2\times \pi \times 7^2 + 2 \times \pi \times 7 \times h\] subtracting the area of the circles from both sides \[461.8 - 98\pi = 14\pi h\] divide both sides by 14 pi \[h = \frac{461.8 - 98\pi}{14\pi}\] now you can calculate the value of h

  7. briana.img
    • one year ago
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    @campbell_st got 3.4! thanks for the steps i'll look at this next time i need help on it again!

  8. anonymous
    • one year ago
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    Round[ 3.49968, 0.1] = 3.5

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