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Math Help - word problem

  1. #1
    Junior Member
    Apr 2008

    word problem

    Central park is a rectangle with an area of 840 acres. It is 1/2 a mile wide. One acre is 43,560 square feet. Two people start at the south-west corner at 1:30 pm and start walking round the park in opposite directions. One walks at 9 mph the other walks at 2 mph. How long until they meet again?. A mile is 5280 feet.
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  2. #2
    Eater of Worlds
    galactus's Avatar
    Jul 2006
    Chaneysville, PA
    The park is 2640 feet wide. It is (43560)(840)=36,590,400 square feet.

    That means the length is 13,860 feet.

    The perimeter is 2(13860)+2(2640)=33,000 feet or 6.25 miles.

    Sinc eht ewalkers are heading toward one another around the park, their cumulative speed is 11 mph.

    Since d=rt, \frac{6.25}{11}=\frac{25}{44}=.56\overline{81}

    Multiply by 60 and we find it takes a little over 34 minutes.
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