math

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how many 4 inch by 8 inch bricksare needed tobuild a walk 6 feet wide and 24 feet long?

  • math -

    divide the area of the walk by the surface area of the brick

    Area walk= 24*6 ft^2
    Area brick= (4/12)*(8/12) ft^2

  • math -

    6' wide x 12 in/ft = 72 inches
    72 inches/4 inches/brick = 18 bricks needed for the 6 foot side.

    24' long x 12 in/ft = 288 inches.
    288 inches/8 inches/brick = 36 bricks needed for the 24 foot side.

    18 bricks wide x 36 bricks long = ?? bricks total to cover the area.

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