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Math Help - units converts

  1. #1
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    units converts

    convert to cubic feet:

    64.2 inches x 30.0 inches x 26.0 inches
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by tangerine_tomato View Post
    convert to cubic feet:

    64.2 inches x 30.0 inches x 26.0 inches
    Multiply each term by \frac{1~ft}{12~in}

    Then when you multiply everything together, the units will be in ft^3

    --Chris
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  3. #3
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    Quote Originally Posted by tangerine_tomato View Post
    convert to cubic feet:

    64.2 inches x 30.0 inches x 26.0 inches
    Quote Originally Posted by Chris L T521 View Post
    Multiply each term by \frac{1~ft}{12~in}

    Then when you multiply everything together, the units will be in ft^3

    --Chris
    u can do that \frac{64.2in}{1} *\frac{1ft}{12in} and that would cancel inches out blah blah....then repeaton on other 2 dimensions then multiply to geth ur answer in feet cubed

    however this may also help u in the future \frac{1ft^3}{1}*\frac{12in}{1ft}*\frac{12in}{1ft}*  \frac{12in}{1ft} thus canceling feet cubed so you now have 1ft^3= 1728in^3

    thus 64.2in*30.0in*26.0in =50076in^3 * \frac{1ft^3}{1728in^3}giving you 28.979...ft^3

    we can check your answer by doing the above method chris showed (probobly safer but much much slower.....(as u can record how man inches cubed are in a feet for future use)

    so \frac{64.2in}{1}\frac{1ft}{12in}=5.35ft

    \frac{30in}{1}\frac{1ft}{12in}=2.5ft

    \frac{26in}{1}\frac{1ft}{12in}=2.1111...ft

    and finaly

    5.35ft*2.5ft*2.1111..ft=28.979...ft^3

    hope that gives u help in the future..shortcuts are always nice(just can get messy if u make mistakes)
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