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anonymous

  • one year ago

A cylinder has a volume of 175pi cubic units and a height of 7 units. The diameter of the cylinder is 5 units 10 units 12.5 units HELP!!!!!!!!! Because I don't understand this at ALL!!!!!!!

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  1. Jack1
    • one year ago
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    Volume of a cylinder = pi x r^2 x h

  2. Jack1
    • one year ago
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    a diameter is twice the radius... so diameter is 2 x r \(\Large V = \pi \times r^2 \times h \) V = 175pi h = 7 pi =3.1415.... now solve for r then double it

  3. anonymous
    • one year ago
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    So would you divide everything over the the 175?

  4. Jack1
    • one year ago
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    \(\Large V=π×r^2×h\) \(\Large 175\pi=π×r^2×7\) so first... divide both sides by pi then divide both sides by 7 then you should be left with r^2 = ... a number then sqrt both sides and you should be left with r then double it... and that = d

  5. anonymous
    • one year ago
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    I just got a number like 4,000 and something. I seriously don't understand :( I'm sorry...

  6. anonymous
    • one year ago
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    OOOH WAIT!

  7. anonymous
    • one year ago
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    Is the answer 10?

  8. Jack1
    • one year ago
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    bam! u rock!

  9. Jack1
    • one year ago
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    yep, d = 10 ;)

  10. anonymous
    • one year ago
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    Thank you so much! Sorry it took so long lol

  11. Jack1
    • one year ago
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    all good dude, if it was easy it wouldn't be fun ;)

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