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29 June, 12:50

Sue can sew a precut dress in 3 hours. helen can sew the same dress in 2 hours. if they work together, how long will it take them to complete sewing that dress? round to one decimal place.

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  1. 29 June, 12:53
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    1/3 + 1/2 = 1/t

    The LCD is 2*3*t.

    If you multiply everything by the LCD, you can clear your fractions.

    6t (1/3) + 6t (1/2) = 6t (1/t)

    2t + 3t = 6

    5t = 6

    5t/5 = 6/5

    Answer:

    Which is: t = 1.2 hrs.
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